I was wondering if anyone knows which valve springs I need to run with my Ford b-cam. It's going with stock heads and valves. I am unsure of the spec on the heads (e-7, gt40p, etc) I can't find any identifiers on the heads or numbers. I do believe they are 1985 302 truck heads though, as all the parts that came off the motor seem to be of the same year and type. I will also be converting to a roller block with the link bar lifters. What seat pressure, or open/close pressures should I be looking at? I would like to go with a dual spring set up, but want to make sure I get the right springs for the motor I am building. Thanks