Its just my opinion but I dont think the cam is all that big. Bullet made me a custom 251/255 for my stock stroke 360 and the car is heavy with the same compression as the op's. But every time ive had a cam made for a stock stroke combo the cam grinder always told me to advance it..and not one time was it over 104. Op would be doing himself a favor to call the cam company himself and get their opinion.