Re: SO who came up with the GMC V6's???
Thanks guys! Yeah, according to the specs I've seen my SM420 has a 7.06 1st gear. I never did get what it was with GM and these crazily wide ratio trannys. They are horrible for towing heavy stuff. I mean 1st, 2nd, and 3rd aren't to bad....but 3rd is so low that you can't rev it high enough to shift to 4th. lol Unless on perfectly flat ground or downhill. Or you shift at 5000 rpm. haha For the occasional heavy towing I'm doing I think it'll work OK. Hoping to search so local yards though.
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"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
My youtube channel aka Military Chevy:
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