what do you think my compression is with a gsr block and b16 head with jdm itr pistons? will this be enough to push toda spec b's or c's? or should i get a thinner head gasket to raise compression?

 

With a gsr block, b16 head and JDM itr's your compression should be around 11.1. It wouldnt hurt to go higher with toda b's or c's. Other options with oem pistons would be CTR pistons would put you around 11.7 or if you wanted to go inbetween jdm P30 pistons should put you around 11.4.