Help! I was an "etched in stone chevy guy" who has crossed over to the dark side-my question is what is the deal on the 351 cleveland vs windsor? I wanna swap -out with 289 in with 351 in my 68 fastback plus dump the c4 for a T5(I know what I`m in for there)My question is what is the physical difference? bolt-in-wise, what years are the best to get? guys tell me that there are different sizes of block castings (webbing) to bellhousing,some for big-block c6s some for small block applications-I hear all kinds of answers. Is bolting in a cleveland with the hassel?does it entail that much more work if any vs a winsor installation? I have yet to obtain any drivetrain components and if somebody don`t set me straight I swear I`ll stick 327/muncie drive train in it!