Are you planning on running the turbo aswell? I've heard turbo cranks are hardened, so if you were going turbo, I'd change cranks. As far as turbo heads without the turbo, I know that Corvair turbo heads are very low compression and don't perform worth a crap without the turbo. I can't say for certain about the SVO.
no i am keeping it a non turbo car.i have heard that you need to shave a n/a head to work on a turbo motor .so i am hopping it will raise my comp a little.
Hang on!! You got it backwards. You'll have to shave the living snot out of a turbo head to get it to run close to where it did with the n/a head! The naturally aspirated head has a smaller combustion chamber. It's nearly heart-shaped as opposed to the D-shape of the turbo head. That why it's not advised to use the n/a head on a turbo motor. Smaller chamber=higher compression. Bigger chamber = lower compression. If you think it's a pig now wait til you bolt that turbo head on there. It won't make enough wind to blow out a candle. On the bright side, with compression that low, you could piss in the empty fuel tank after an all night pub crawl and get home
There's also nothing special about the cranks. The crank in the turbo motor is the same as the crank in the n/a motor. The only changes were made long after the turbo cars were out of production.
There's not that much difference in the cams either.