Anyone know of an off the shelf LT1 piston that will yield around 11.0-11.5 compression ratio with 58cc chamber heads.

Stroke is 3.75"/with a 6.0" rod

The only thing I have found are SRP's for 10.4 & 11.8. Don't really want the cost factor related to custom pistons

 

Your best bet is the 16cc dish SRP's for a good piston for a good price.

 

I just picked up the same set. Great quality piece at a resonable price.