because in boosted application the roller block has been known to handle up to 30lbs @ about 700 hp with out any problems. I 'm wanting to put 20-25lbs of boost into a cleve and see how long it would jive for. I think the mains AND possibly the MA crank could handle it. I've heard of a cleve with 15lbs of boost that has not had any problems. By the way I wanted to thank you Brent for all the input you've put in this web site lately. This a special group of people.(I don't know if we are short bus special or an elite group)I fall under the short bus category. Thanks again