I am about to change motor in my 85 SS Monte Carlo, what
do I have to do to make a 454 c.i. fit in, (motor mounts, rad,
clearance compared to small block, hood clearance, front end
etc.

Thanks
SSMC454

dude , its a common swap anymore, ass far as motor mounts , oil pan, headers and stiffer springs, u can find them all in a summit or jegs type magaizine, as far as rad u will not have clearannce problems if u run a eletric fan, which gives u more power and i feel there just a better unit,,, u will need a cowl hood if u remain with a stock height intake u will only need a small cowl, but as u go higher so must the hood drop me a line if u got any ?'s i mmight help u with later JERSEYGBODY