Originally Posted by
Tom N
The cams are different and some non turbo heads have a block off to not allow oil to flow out the side to the turbo.
Ive read some N/A heads have coolant passages blocked off also that need drilled out.
The blocks are the same except the N/A doesnt have oil squirters if I recall, but if you are gonna run forged pistons it doesnt matter.
Definetly swap in turbo cams into the head, I am currently running a N/A head with the exhaust cam retarded a tooth, and my car runs like a total dog, dead around top end. But Im fixing that soon.