[jon v]

The heads are actually very similar aren't they?

 

[jon v]

but will a built tsx head similar to a built type r head? thats basically what i want to know.

Yes... You will use all the same cams, springs, and retainers. The TSX head stock should produce a little more torque because of the smaller ports, but once you start working on them they can be built just aqbout the same...