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Ken - GOOD CATCH! You are correct, the flange bolt heads are too high to clear the torque converter. Whew, that was close! I owe you a cowboy steak! I'm ordering the correct flex plate bolts now from Summit.

Yes and that is exactly what I am preparing to do. I am trying to decide which starter to install. I have my original 1984 27MT direct drive off my 6.2 which has only 12,000 miles, but it seems sacrilegious to use that old-school starter on this P400 6.5 engine. I considered a HMMWV starter...

Rich I apologize I thought you were referring to the water pump plate, not the aluminum timing gear housing. My new P400 has no visible gasket between the housing and the iron block, just some red goo which has not hardened but will clean off easily. This must be that anaerobic sealer you...

The P400 was designed by GEP for the upfit HMMWV. Forged crank, forged rods with fractured cap technology, forged pistons with ceramic coating, thicker decks, improved water passages, hardened valve inserts, plus a unique 3" steel girdle surrounding the bottom end. But to answer your question...

Ken - thanks for the heads-up. I will measure them tomorrow and report back.

Well, why wouldn't my original direct-drive 6.2 starter work? My P400 block appears to have the threaded hole for the starter brace.

Not the 6.2. My new P400 is what the starter is going on.

Well heck. Back to square one. Still looking for new HMMWV starter for my P400 build.

Thanks Fox. Now I understand. I am looking for a direct-drive 24-volt starter. Hmmm.... I just remembered, I already have an original direct-drive 24-volt starter which came off my M1028 when I replaced it with the newer gear reduction unit. Let me see if I can find that thing, and if so...

Juan thanks for the post. Are you saying that a new HMMWV starter will not fit my new GEP 6.5 P400 block? My P400 came directly from GEP in the crate, so what I am looking for is the correct 24-volt starter for that engine. I prefer a new starter however not opposed to an excellent rebuilt...

Anybody happen to have an email address and/or cell number for Michael Vaiden? He has not responded to a message sent through his website and the number listed on the site will not allow me to leave a message. Still looking for a new GEP HMMWV starter. I wouldn't turn down considering an...

Got my NOS flexplate installed on the back of my new P400 engine.

Update - got my NOS flex plate cleaned and installed. GM part number 14077158. Found it on Ebay for $50 with free shipping. Would rather have this original US-made part than the cheap Chinese stuff available. It had slight surface rust on the gears but quick work with a fine wire wheel...

Rich - your timing chain set is new so why not use it? I seriously considered the gear set for my P400 build but decided against it for several reasons, one of which was my suspicions about that retainer piece. In evaluating the gear set from an engineering standpoint, I felt that the retainer...

I am installing a new GEP P400 HMMWV engine in my 1984 M1028 truck and cannot bring myself to install a cheap Chinese after-market starter on this magnificient piece of machinery. I have a few extra dollars laying around, and would like to purchase a new 24-volt starter that is correct for the...

While waiting on my metal fabricator to produce the Spinner bracket, I became uncomfortable with the ability of my engine stand to hold the weight of the P400 as I continued to add parts. So I jumped into my shop and designed/built a laminated beam cradle for the engine to sit in during...

Completed on my P400 build - New injection pump driven gear installed Rebuilt 200 HP DB2831-4911 mechanical injection pump installed Brand new injectors installed Brand new injection lines installed 700R4 TV bracket refurbished and installed HMMWV oil pump gear installed New FlowKooler...

Ok let me get this straight - you have a civilian K5 blazer. The vehicle originally came from GM with the standard gas engine but somebody in the past swapped in a 6.2 diesel and Jerry-rigged switches for glow plugs and high idle. Respectfully, I believe you should post your questions over on...

Yes I studied that kit in depth before embarking on my effort to fabricate a custom bracket. The casting in that kit is unique to the Duramax and will not work on the front of a 6.2/6.5. I wish that it would, because it would certainly make it easier to add the Spinner to my system. I’m almost...

Rich - I fully intend to photo-document everything I do to my P400, including the Spinner centrifugal filter install. Regarding that, I am now in the process of engineering and fabricating a mock-up model bracket for the Spinner to mount on. The Spinner CF spins the oil at 6000 RPM via normal...