New GM LS3 block
#7
ModSquad
iTrader: (6)
The ls3 blocks come with cam bearings installed. I'd take it to a builder to check it. Very cheap insurance.
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#8
#9
They come complete ready to assemble. There even pretty clean out of the box. I would clean it again anyhow. Only problem for your 416 is that they are just straight bored for the 4.065 factory piston at .00005 clearence and deck plates are not used when they are honed. No prob for the factory as they are designed to wear but with a 416 and forged pistons it should be rehoned with deck plates and get your proper clearence. They move a ton with the deck plates.
#10
10 Second Truck Club
iTrader: (25)
They come complete ready to assemble. There even pretty clean out of the box. I would clean it again anyhow. Only problem for your 416 is that they are just straight bored for the 4.065 factory piston at .00005 clearence and deck plates are not used when they are honed. No prob for the factory as they are designed to wear but with a 416 and forged pistons it should be rehoned with deck plates and get your proper clearence. They move a ton with the deck plates.
#11
Teching In
iTrader: (3)
Join Date: Apr 2009
Location: central NY
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I would definately recommend going to 4.070 (using a deck plate). Also worth noting....check piston to deck height in cylinders (1,2,7,8)... GM didnt do a very good job at holding parallism (at least with my brand new ls3 block)... mine was .004 differance from front to rear....and .002 different from one side to the other.....