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Also I got this unit with out the alignment dowels (5/16"). Are the dowels the same size from end to end or different diameter on each end? The dowels should be a slight press fit in the block but not in the cover. 
The dowels are not the same size on each end. One side is ground and will slip fit into the cover. The other end is ment to fit into the block after drilling. You need to mount the cover and use the newspaper as instructed to get the prper backlash. This will position the cover for drilling the pin holes. Then you use the proper drill/ream to get the dowl pin hole size.
If you look at the pins, you will see what I'm talking about. Do not expect them to fit into the block as-is.
Allan G.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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