I just can't help but wonder if there were a few errors made in calculations or something which is contributing to the low HP number on the dyno?? IE its nowhere near 10.8:1 and rather 9.8:1 or similar. If the compression is smallish, the cam is smallish, the loose torque converter etc might be exactly why the car isn't making the power like it should. Because I still think that even a mild 383 stroker with 10.8:1 compression and those heads etc should do WELL more than 315whp!