Engine swap poll

Engine preferences for engine swaps

  • Used 6.2L/used 6.5L

    Votes: 1 8.3%
  • New or rebuilt 6.5L

    Votes: 7 58.3%
  • Gasser swap- new crate motor

    Votes: 1 8.3%
  • Used gasser

    Votes: 2 16.7%
  • Build an engine

    Votes: 1 8.3%

  • Total voters
    12

85CUCVtom

Member
Steel Soldiers Supporter
712
14
18
Location
Lakewood, Ohio
Just want to get a general feeling of how everyone feels about engine swaps in the CUCV line of trucks. My engine is fine as of now, I just want to poll the crowd here and see everyone's opinions.

I have a blazer now and I always tell myself that if/when the 6.2 goes, I would love to have a 383 gasser with a 4 speed. I have no emotional connection to the diesel. I would probably get a GM Performance HT383 crate motor and use my TH400 with a new torque converter until I found a 700R4. Some people prefer building engines versus buying crate engines and some people would replace with a used 6.2 or a new 6.5L crate motor.

What is your opinion on CUCV engine swaps and what would you do if you were swapping engines?
 

tobyS

Well-known member
Steel Soldiers Supporter
4,348
174
63
Location
IN
Just want to get a general feeling of how everyone feels about engine swaps in the CUCV line of trucks. My engine is fine as of now, I just want to poll the crowd here and see everyone's opinions.

I have a blazer now and I always tell myself that if/when the 6.2 goes, I would love to have a 383 gasser with a 4 speed. I have no emotional connection to the diesel. I would probably get a GM Performance HT383 crate motor and use my TH400 with a new torque converter until I found a 700R4. Some people prefer building engines versus buying crate engines and some people would replace with a used 6.2 or a new 6.5L crate motor.

What is your opinion on CUCV engine swaps and what would you do if you were swapping engines?
The 327, 350 are good alternative crate engines too and yes, I like the alternative to OEM. Would seem more efficient to do tranny at the same time as engine. What gears do you have? With higher rpm for today's engine, rpm may be an issue. Did you search for prior discussion ?
 

sargent43

New member
16
2
3
Location
Southern Oregon
You should consider swapping a Cummins 5.9 12v into it. Easy swap and its an all mechanical motor, that's arguably the most reliable motor ever made. Also you can turn them up and make good power with a screw driver and Allen wrench. If you want more power then you could throw a set of injectors in (30 min job) and a new turbo. Also it would get better MPGs then the 6.5.
Just my 2 cents.
 

chevymike

Active member
Steel Soldiers Supporter
347
143
43
Location
San Diego, CA
You should consider swapping a Cummins 5.9 12v into it. Easy swap and its an all mechanical motor, that's arguably the most reliable motor ever made. Also you can turn them up and make good power with a screw driver and Allen wrench. If you want more power then you could throw a set of injectors in (30 min job) and a new turbo. Also it would get better MPGs then the 6.5.
Just my 2 cents.
I loved my 12v in my Ram when I had it. Downside from what I have read, it is hard to put a 12v into a stock squarebody 4x4 without a lift. And 12v are heavy! They weigh almost as much as the 6.2/trans/transfer case combined.
 

sargent43

New member
16
2
3
Location
Southern Oregon
Dending on what your version of heavy is, they might be. They around about 1100 lbs, as for the height I can't speak. I don't have any experience with CUCV's.
However if I had to take a complete shot in the dark, I would imagine a set of new Heavy duty springs would over come the weight and height obstacle.
Again just taking a shot in the dark as I have no experience with the CUCV personally.
 

85CUCVtom

Member
Steel Soldiers Supporter
712
14
18
Location
Lakewood, Ohio
I loved my 12v in my Ram when I had it. Downside from what I have read, it is hard to put a 12v into a stock squarebody 4x4 without a lift. And 12v are heavy! They weigh almost as much as the 6.2/trans/transfer case combined.
In this situation I’m not looking to go down the diesel route outside of a used 6.2 or 6.5.

Ease of replacement is high in the priority list


Sent from my iPhone using Tapatalk
 

nyoffroad

Member
522
20
18
Location
Rochester NY
At my age 60+ I'm looking to make things easier and less challenging so with that in mind I'd stick with a 6.2.
Twenty years ago the answer would be what ever engine I have or afford will fit one way or another!
 

Nessmuk

New member
13
0
1
Location
Tti Cities, VA
Just want to get a general feeling of how everyone feels about engine swaps in the CUCV line of trucks. My engine is fine as of now, I just want to poll the crowd here and see everyone's opinions.

I have a blazer now and I always tell myself that if/when the 6.2 goes, I would love to have a 383 gasser with a 4 speed. I have no emotional connection to the diesel. I would probably get a GM Performance HT383 crate motor and use my TH400 with a new torque converter until I found a 700R4. Some people prefer building engines versus buying crate engines and some people would replace with a used 6.2 or a new 6.5L crate motor.

What is your opinion on CUCV engine swaps and what would you do if you were swapping engines?
292 I6
390 CFM 4 barrel.
Dual cast iron headers.
Cast aluminum valve and side covers.
High compression pistons.
Lump port the head.
ARP studs.
Vroom.
 

Sharecropper

Well-known member
Steel Soldiers Supporter
1,425
188
63
Location
Paris KY
In my opinion, your easist swap, and to gain power, will be a later model 6.5 turbo diesel. Everything will bolt-up just like the 6.2 without modification, except for the turbo exhaust and plumbing. This engine will bolt-up directly to your original TH400 transmission, however most folk opt for a 4L80E or built-up 700R4 overdrive transmission. If you opt for the 4L80E, you will need to change your crossmember and change lengths of both driveshafts. However the 700R4 will replace the TH400 without these changes, only needing an adapter for the height of the crossmember. If you opt for the 700R4, you should source, at a minimum, a Level II from a reputable transmission builder, such as Bowtie in California. Unlike the 4L80# which requires an electronic controler module, the 700R4 is "dumb" and gets its instructions through a TV cable attached to the IP linkage. The only difficult part to find is the 6.2 diesel TV cable bracket, however there are regularly on Ebay for around $100.

Hope this helps. Here's a photo of my P400 / 700R4 / NP241 ready to be installed in my M1028 -

DSC_0693 (2).JPG
 

teletech

Active member
Steel Soldiers Supporter
349
66
28
Location
santa cruz,ca
Just to muddy the waters even more, a 16V 4BT would make about the same HP as the 6.2 but with a lot more torque. It would be an easier fit and wouldn't weigh the truck down like the 6BT.
Me personally, I have plenty to do so I think I'd look for a 6.5, nothing wrong with the motor and an easy swap.
 

chevymike

Active member
Steel Soldiers Supporter
347
143
43
Location
San Diego, CA
Just to muddy the waters even more, a 16V 4BT would make about the same HP as the 6.2 but with a lot more torque. It would be an easier fit and wouldn't weigh the truck down like the 6BT.
Me personally, I have plenty to do so I think I'd look for a 6.5, nothing wrong with the motor and an easy swap.
I have been thinking 4BT. You can get some more HP/TQ with some light mods. Only downside I have really read about is they vibrate more than a 6BT or V8 diesel.
 

teletech

Active member
Steel Soldiers Supporter
349
66
28
Location
santa cruz,ca
I have been thinking 4BT. You can get some more HP/TQ with some light mods. Only downside I have really read about is they vibrate more than a 6BT or V8 diesel.
The Isuzu 4BD1T is their answer to the BT is supposed to be just as good but with more attention paid to NHV. Usually cheaper and easier to find too.
 

2INSANE

Active member
Steel Soldiers Supporter
229
46
28
Location
Belgrade, Montana
I would go with an optimizer 6.5 TD. Or P400. Keep it below 15 psi boost and smile and waive.

used 6.5 or 6.2 hybrid TD no higher then 10psi boost if on a budget.
 

Davetheplumber

"Moose"
Steel Soldiers Supporter
50
1
8
Location
Corbett, OR
Sooooo much money money money for what? Tons of noise and smoke? Not bashing the Cummins or even the newer 6.5s but gosh, so much headache and for what? Anyhow, I got an old chevy with a good 454 and had everything I needed for $1,200.00. Running for years in my Blazer and the expense (other than fuel) has been oil changes and one fuel filler. They are much More quite (even with the 40 series Flowmaster) and they run smooth. Those darn diesels rattle the trucks apart over the years. I love keeping thing original but... 6.2 in a blazer... Not for this guy
PS... chicks dig the big block sound too!

Correction! I also had to get a different vacuum module for the trans to get the shift points correct... $15 ish
 

reloader64

Member
318
5
18
Location
Liberty Hill, Texas
Any small block Chevy will bolt up to the TH400 transmission, and the motor mounts. More power, decent fuel mileage, and with the 3.08 gear in the Blazer, no worries about excessive RPMs.

Scott
 
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