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Old 02-03-2013, 09:24 AM
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cobalt327 cobalt327 is offline
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The difference in how deep the flat tappets sit in the roller block doesn't matter, the pushrod length does.
A flat tappet cam uses a pushrod that's about 7.8" long. The stock Chevy hydro roller cam pushrod is only about 7.2" long.

The block is a 1-piece rear main seal.

Valve train geometry
Valve train points to check
Cam break in
Adjusting hydraulic lifters
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