ok so i guess just go with the ls1 adapter plates i found them on ebay, i curently have a 4.3l v6 with a five speed manual. i know of course to buy new motor mounts, and im guessing the 4.3 and the SBC should be the same mounts right? the tranny i want to use is the 5 speed that i currently have in my truck. i have been told that it will work just fine, but there will be one mounting hole that wont match up, and not to worry about it. the headers, i was looking at my stock exhaust manifolds, and thee was a crack , not on the manifolds, but on part of where it mounts to the motor.should i still go ahead and find a set of stock exhaust manifolds, or use some aftermarket manifolds made for a truck? any info helps.. thanks