Got a reply from Ohio Crank today and they said the billet can only be made with Chrysler journals. Well, since I don't want to run with anything larger than BBC journals, the billet piece is out. From the info I have gathered, I have learned that 1) aluminum rods will not clear the cam with crank strokes longer than 4.500" and 2) crank strokes longer than 4.500" will cause excessive piston skirt wear. Interesting enough, I have read somewhere about a new piston being made with an asymmetric skirt, favoring the major thrust side. Maybe just for this kind of build. You don't need aluminum rods for a N/A bracket motor. If it were me, I'd be running a good steel rod in that motor. Less maintenance and there's really no benefit as far as weight. Not to mention you can go w/ more than a 4.5" stroke in a std. cam height block if you want. Just me, but I really wouldn't be concerned w/ a little skirt wear on a motor like this. It isn't gonna be driven 50k miles back and forth to work.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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