1.5 or 1.6 ratio how to choose?

Not they you wouldn't check everything out with 1.5 ratio rocker, but the use of 1.6 ratio rockers requires even more through inspection. Pushrods start getting close and sometimes require clearancing on the heads. When you play with geometry it may also require shaft spacers and for sure will require different pushrods. It just not a simple upgrade. Personally I would have stayed with the 1.5 ratio.

Tom