So your saying with a little work the 420A can be just as good as the 4g63 and not have to worry about crank walk? Would cams help our car as I heard many turbo cars putting the 420A cam in theirs? Still only found crate motors to order and not just a block to build my own engine from. I heard fuel cut-off from our computers is the worst, but can get a fuel computer to elimate that problem. Man I didn't realize that these cars where so different between each model. Thanks