A few years back, before buying my Mega Block, I inquired about any strength issues that the stock Ductile Iron Cross Bolted main caps might have. Muscle Motors replied that they had not had any issues at 1300+ Horsepower, but I am thinking that may have been Dyno blasts, not on track testing. So, would using either stud girdle in conjuction with the Ductile Iron mains and Cross Bolting be practicle at, say, 700 HP or so? Overkill? Tossing good money after bad? This in a 3400+ Lb. "B" body. I am a firm believer in building killer bottom ends, it tends to save $$$$ in the long run.