I recently aquired a 426 mopar crate hemi that apparantly ran really well/strong,but has lowish oil pressure when hot.it came to me minus oil pump so I am going to order a pump for it today.Should i get stock replacement or hi psi or hi volume pump for it? i plan to run it as is for now...
As stated, I would go thru it first and check clearances. Hemi's like putting oil up top in the heads, so if you don't have a big 12quart pan and put a big pump on it, oil pressure will not only get worse, it may lock right up.