I'm stuck on what engine I want to install in my '70 Impala coupe. I have '72 400 sbc 4 bolter from a '72 Caprice I can go through or use the 350 9C1 out of worn out '86 Caprice (had a '91 9C1 350 gone through back in 2005 top to bottom for the '86 & runs sweet). What are your thoughts on the earky '70-'72 400 4 bolt main sbc in Pontiacs? My biggest fear is the overheating issues these engines had, and this is just for summer/spring daily stop and go traffic and long road trips driving. The '70 has a 12 bolt rear with 2:73 highway gears and will have a 700R4 4 speed auto, thanks.
-- Edited by BIGCARGUY on Friday 14th of November 2014 11:27:21 PM
-- Edited by BIGCARGUY on Friday 14th of November 2014 11:29:53 PM
Yup, they would OH. Ran many in the race cars but those extra 50 cube save on HP upgrades. Found over the years you just need to run a good fan and rad. Ran the 7 blade truck fan ( wider blades with more pitch) Dropped 20 deg. Right fan and rad shouldn't be a problem. We ran ours at 4500-5500 non stop on the trac and we won 3 championships with the 400sb with 800 into it while other guys were 3-4g into their 350. Must have been the driver
