Thoughts on a 225 rebuild

Always use new lifters with a new cam; never re-use lifters on another cam or swap lifters between cam lobes. Save them with the original cam if they are not badly worn; each lifter HAS to stay with its cam lobe. The contact pressure wears the lifters and cam lobes in a closely matching pattern and they should never be separated. You can only use a new lifter on an old cam, never the other way around.

Lifters are ground new with a slightly convex surface; this, along with the off-center contact between cam lobe and lifter face, make them spin around and around on the cam lobes, which keeps the waer uniform. As they wear, the convex surface will be come flat and eventually concave and that is 'worn'. The original /6 lifters are hardened through and through so tend to last a long time.

As said above on the turbo plans: keep CR low. For a turbo, and port work can be dispensed with if you are looking to moderate power increases. But your final direction is quite different if you want to stay normally aspirated, so turbo or not is an important decision to make up front.

Shaving the head is the common way for moderaqte CR increase on this engine. You can put in a composite head gasket and lower the CR a bit. The orignal head gasket is a thin steel shim and you will typically lose a few tenths on CR when you swap. Shaivng .050" is supposedly nothing much and shaving .100" is not uncommon.

The real /6 experts are over on www.slantsix.org; lots of good articles to read there. There have been developed a number of rod and pistons variations that can be used. You have a lot of fun reading to do.