Find someone you trust that knows these engines and talk to them. There are several here that are more than willing and capable.  It takes one to know one...you're one of the good guys Thanks Zippy! Glad I could help you, what little I may have, b/c you did a helluva job on yours. I had help from members here years ago when I first built mine...happy to return the favor. 
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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