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Because I have a new P400 I will try to answer for Rich. The P400 long block was available as a new crate assembly from GEP, the manufacturer of the HMMWV. The engine was designed and put into production for the new heavier, upfit armored HMMWV, however GEP lost the government contract to...

Now..........you are educating yourself. Keep going.

If I had not found the P400, I would have probably got one of those Optimizers from Bostic in South Carolina. That's who you are referring to, isn't it? I would still talk to Rich before I did anything. He can tell you the right questions to ask at Bostic. Git 'er done.

You can certainly do as you choose, however I strongly urge you to slow down and learn as much as possible about the optimizer castings. There were different castings which were better than others. Like I said, Richingalveston has a world of knowledge and experience on optimizer castings and...

There was an article I saw somewhere which detailed the differences in evolution of the 6.5 blocks. I remember there were several years of problem castings, but seems like there were certain production years which were the best. Since you are not going to turbo it you shouldn't have too much...

thank you!

My truck has been raised 5". Plenty of room between the stock oil pan and axle. The special cast aluminum oil pan on the P400 only hangs down 1-1/2" lower than the 6.2 pan. After seeing your post I rolled under the truck and measured it to make sure I hadn't missed something. I don't...

I've downloaded several HMMWV TMs and still cannot find the diagram of how the headlight bucket goes together. Any help you guys can provide to steer me in the right direction will be appreciated.

I considered Lizard Skin, however after reading about the product on their website, I can't see how the recommended thickness could add much insulation or sound control at all. They recommend the first coat of sound control (to be sprayed with their spray gun which you must also purchase) to be...

Everything on a 6.2 will bolt right up on the NA 6.5, however the serpentine belt engines use a counter-clockwise rotation water pump, where the V-belt engines use a clockwise rotation pump. Also, stay away from the idea of converting a military turbo 6.5 to a non-turbo engine, as the intake...

I am considering a custom fabrication/installation to use round HMMWV headlights on my M1028 CUCV. Because I have no experience with HMMWVs, I would like to know which TMs to download so I can see how the headlight buckets and adjustment ring/bezel go together. Has all HMMWV headlight mounting...

Nice work. I applaude you for thinking outside the box (pardon the pun). Are you planning on armoring the cables from the engine to the boxes? I believe if it were me, I would consider running the battery cables in some type of protective conduit, such as Liquid-Tite, which is easily cut to...

Is it something you could do yourself with help from us on SS? Conveniently, everything is spelled out step-by-step in the CUCV Technical Manuals (free download in the Stickies). And for the most part, basic hand tools are all that is required to do most tasks. I am not a "mechanic" by any...

I'm planning on removing the front clip in order to easily install the new P400 / 700R4 in my M1028. I'll install the NP208 after the engine & transmission have been bolted in. You might as well go ahead and replace the 2 rubber bushings under the core support while you have it out. These can...

OK I am moving forward with adding AC to my P400 / 700R4 build. After researching all available options, including retrofitting a civilian setup into my M1028, I narrowed my choice down to 2 aftermarket kits - Nostalgic Air and Vintage Air. And after researching both kits, I chose Vintage Air...

In my opinion, the 6.2 can be a dependable, long lasting engine IF it is kept clean and cool. The engine was not designed to handle the increased pressures and heat of a turbo charger. Keep your air filter clean and change oil & oil filter regularly. And don't red-line it. Cruise, don't...

OK here is the contact information for the A/C brackets - Component Parts, Inc. Fab Division PO Box 7514 3100 Chesser Boyer Road Ft. Worth, TX 76111 817-834-4771 Fax: 817-834-8647 (yes they have a fax!) I spoke with Ms. Lillian, who I understand to be the wife of Herb the machinist who...

Im spending my daughter’s inheritance. She will never know.

I managed to pry CPI’s info from the warehouse guy at Nostalgic. They seem to be just a small mom & pop machine shop in Ft Worth. They are old fashioned with no website or social media presence. I have their contact info at work and will post it when I get back into my office. The lady I spoke...

The kit from CPI was around $240 + freight. To my knowledge, CPI is the only source for the crank pulley. It is heavy cast with excellent machining. In my opinion, the crank pulley is the best source of energy to power the compressor. Independent from the other belt driven appliances. The...