I have built one this year using the Eagle Cast Crank ( internal balance ) Eagle Sir rods ( 6" ) and some Mahle Forged Flat tops. The entire rotating assemble with Bearings and rings was delivered to my Door with a race balance for somewhere around $950. The block had to be clearanced to clear almost every rod ( bolts ). the crank shaft counter weight hit the block near the rear bearing. the back side of 2 rods had to be ground ever so slightly to avoid hitting the cam. Total time to clearance was around 2 hours. but it was worth it. Its been a great motor so far. I have built 12 of these 383's so far. The H-beam rods seem to clear the cam with no problem, but they are a little bit bulky and some additional block clearancing needs to be done. Just be careful of those water jackets. I prefer to do all the clearancing before the block goes to the machine shop for boring/ line bore etc. That way the machine shop gets to clean off all your grinding mess!!!