400 engine

look for the casting # on pass side of engine 230 best block ever built 630 was used up to 75 530 after 75 these are the last 3 digits in the casting number, yes, the 451 is just perfect, its a screamer and has a rod ratio of 1.80 ,cant be beat by any 440 given same components in both engines..tell him 2 400s instead of the 440 heh talk with brandon at 440 source ,he will hook you up, collect the 400 engines as when brandon introduces their new block the stroker kits for the factory block guys will be reduced, heh,so he says anyhow, I built a 451 4 years ago and the guy runs 10.0s and has never taken the engine apart after more than 250 passes hahaha. I try to tell him to let me checkout the bearings and clearances but he just blows me off, but hes an old guy and hard headed. I only use the 230 block for ultra high output engines 800 plus hp. I can build a 400 with a 383 crank non stroker using a hyd cam and get 550 hp out of it which a later block could handle with ease with no filler ,girdle, or main studs