i am having short lived head gaskets in datsun A12 engine.engine build was probably done by jb racing engines 1987 or 1988.i don't have any more information. the engine is fed by 2 45dcoe webers and shocked by a msd crank fire ignition. i don't even know the proper torque values for the head bolts. i have been using stock numbers and i suspect they are low and part of the problem. could someone recomend a brand and composition head gasket and torque numbers. thank you,
pussmnky@aol