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Thanks everybody for the opinions. I am leaning towards completely rebuilding/installing my original 1984 Delco 24v direct drive starter. I have come to the conclusion that a HMMWV starter will be too big and heavy, and the modern gear reduction units are made in China. My original Delco is...

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...

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...

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...