Since the heads on this 360 are very very limited it could have capitalized on a milder cam with a 110-108 LSA, and RPM style intake and probably made 30-35 more ft/lbs 15-20 more HP @ the same peak and had a better idle to boot. In fact I know it would have as I have built 360's in this manner many times before. I'm not surprised this one didn't break 400 ft/lbs easily. I love solid flat tappet cams but I have NEVER seen the .528" whether it be in a B or an A engine work very well. This cam NEEDS great cylinder heads to make it look even remotely good. I'll probably get flamed for this but I believe the .484" hydraulic P.S. (or is it P.O.S.?) works better than the .528 J.Rob