I was wonderin if there is any difference between the LO3 exhaust mainfold and the L98. I doin the 305 TBI to 350 TPI swap and one of the TPI manifolds is jank. I have searched and have been unsucessful. If this topic has already been covered, just point me to the right post and I'll be happy. Thanks.

 

LO3 manioflds < L98 Manifolds < headers

 

If you have everythying apart you might as well stick a set of headers and y-pipe on the car. L98 manafolds will be better but nothing compaired to a good header and y-pipe combo

 

well, I have this nice exhaust that I got from the parts car but it has the stock manifolds. It has a nice y-pipe that I don't really want to cut up and I don't want to put money in headers because after I get it running I want to turbo charge it.