Brad Miller makes an awesome lifter. Mike at MRL put a heck of lot of R&D into these lifters with Brad. I have a 59 deg Mopar 340 resto/Siamese block with W5's. These blocks have super thick and high lifter bosses and unfortunately because of this, too much clearencing was required for 3/8 pushrods and 180 offset intake seat lifters. However, centre/centre pushrod seats would require minimal clean up with a die grinder between the lifter bores to clear the tie bar. On a factory block, I don't think there would be any issues though.
Did I say how awesome these lifters look and are designed. If the exchange rate wasn't so crappy at the moment I would definately invest in another set. I would most likely go the bushed over needle rollers next time for a few more $'s.
Have also used the Comp 8043-16 with no issues. On appearance, oil band location and quality, the the BAM/MRL lifters are a teir above.