Engine displacement

[jcd9730]

Maybe this is a dumb question, but I'm still learning about the inner workings of these engines.

My question is, tomorrow I will be taking the heads off to replace a head gasket. When I bought the truck, I was told it was a 350 block stroked to a 383. If it is a 383, its a pretty mild one, but I wasn't too worried about it. The engine size wasn't really a big factor in buying it.

It is a 350 block (checked the cast number), and if it does have a 400 crank, it isn't externally balanced. With the heads off, short of taking the whole rotating assembly out, is there a way to tell if its a 350 vs 383? Measure the stroke maybe?