Originally Posted by zipper06

I've been watching this thread from the start, but waited to chime in until the discussion has covered most of the questions.
I too have a Dart Lil "M" 434" (drag motor)but don't plan to run restrictors, i run the Crower HiPro roller lifters which also oils the rollers thru the lifters and they oil on the lifter body above the band on the lifters, another reason i'm not running restrictors. With the .020 oiling holes to each roller plus the oil holes in the pushrods, i'm not sure i could get enough oil to the dedicated T&D oiling system for the rockers. I don't run a vacuum pump (yet) just a header evac system. The engine is on alcohol with Hilborn stacks.
I know that you (Jim) bought your Dart blk. engine used, but i believe you would have been better off if you could have found a blk. with 350 mains, or run bearing spacers, with turning that many RPMs. That's a big drop in heat and crankshaft weight from 2.650 to 2.450 main jurnal size. In fact most NASCAR guys are running 2.300 main jurnals.

Zip.