Is there a significant difference between a 99 vette LS1 longblock and a 98 Fbody longblock? I know the vette was rated at 350 hp, but I didn't know if that was due to cam/head difference, manifolds, or just GM bs'ing the numbers. I thought I read somewhere that the 98 LS1 heads are pretty much the worst of the batch.

 

Anybody have any idea?