I Do This For The Glory
Join Date: Dec 1999
Location: Nobleboro, Maine
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Re: SR4 replacments ?
I am surprised none of you mentioned running the SM465/NP205 combination (or for that matter the SM465 and any of the mated transfer cases, but the NP205 is the strongest). I swapped it onto my GM151 and it fits like a glove. I did have to have the driveshafts reworked, but it's bulletproof, uses the stock clutch setup, has a 6.55:1 first gear, and is really common so it's REALLY cheap. Your rear driveshaft should be 23" long (mine is 33" long but I have a Scrambler) with this setup, so there is still some length left for lifting.
I have pics if you want to see them.
Also, look to the Marine industry for FI stuff. Also do a search on the WWW, I found a site where a guy claimed to get 300 hp out of his GM151. Don't remember where, but try a search here, I think a link was posted a few years ago. Then again, it may have been the old board, back before the new one started in mid '99. I never cared to get into the hp issue too much as I had always planned to swap it out for a 350 anyway.