Re: Some big block???
Changing to a thermostat with a lower rating (from 185 to 160 as suggested above), won't reduce the coolant's operating temp if it's running at 200 degrees.
Yes, you need a BB radiator and I'd get a good direct-fit aluminum radiator from Griffin or somebody. A factory copper BB radiator was ok for factory 396's, but for a 454 with mods, it will not be up to the challenge,..trust me. Also, I'd get a good high-flow water pump from Stewart or somebody, and as stated above, the factory shroud, fan, and clutch will work great. I'd also spend a few extra dollars for a high-flow 180 degree thermostat. Also, run manifold vacuum (not ported) to your vacuum advance which will keep your timing up at idle and help keep her running cooler.
Regarding your oil pressure, 60 PSI at 2500 RPM is way is too high and is costing you some ponies. I'm guessing some genius has filled the crankcase with 50w or something. Switch to a good 10w-30 and your pressure should come down quite a bit. Pay attention to zinc levels if you'r runnng a flat-tappet.
Last edited by Straight-line-69; Mar 27th, 11 at 09:42 PM.