Ok, so I have a 78 trans am, i have a pontiac 455 short block I was planning to build for it, but today I happened to come across a 454 that Im likely to buy tomorrow. Its a 1990 454 ss. Its complete oil pan to intake, with powersteering alternator and all. It is missing the throttlebody, but im thinking ill go with carburetor anyways. Anyhow before I buy it thought Id ask a few questions about this motor? I was told it had 6.135" dimple rods. Is this stock? If not are they better? Whats the best cam to put in this motor? I would like to attempt getting between 450 and 600 hp out of it. Im gunna try to get by without machining it, i am planning to rering it, and make some upgrades.... any tips suggestions on what I need let me know please. Also I have a th400 transmission here.. that i got for the 455, what do i need to bolt it up to the 454? Thanks. K.C.