Heres an example of a summit kit. Call them and sub out a set of slugs. All the kits appear to be priced the same. I entered a 030 overbore and a 10/10 crank. http://www.summitracing.com/parts/FEM-CSMHP812-311/
This appears to be the only problem I see so far with the kit and performance builds;
Approximate compression ratio 8.66:1 with a 68.4cc head.
