Michael02hawk

iTrader: (26)

Changes over the winter break included having the heads ported and milled (0.012), as well as swapping out the original ls1-style lifters to the newest design ls7-style lifters.

All 8 cylinders (intake & exhaust) we're pretty close, so I added and averaged them all out to:

Intake: 7.356
Exh: 7.353

That is using a 0.075 pre-load.

They are close enouge I'll use the same length pushrod on all 16 valves. I really dont know what preload to use for the ls7-lifter.

Would it be better to go with a 7.350 or 7.375 length pushrod?

vettenuts

iTrader: (4)

You can probably go with either. The 7.375" may be harder to find. I needed 7.475" for mine and no one had the Comps. However, Trend makes them for Comp and they had them in stock (and cheaper).

WKMCD

iTrader: (2)

I just bought Manton PR's from mine. I needed 7.413 and 7.439 to give me the .050 preload I wanted. Called Terry Manton last Wednesday at 5:30EST. They were on my porch when I got home Friday. 11/32's .120 wall.

Terry will make them up for any exact length you want.

poolshark021

iTrader: (8)

+1 for Trend
I would get the 7.350 length.

JBIRD02

iTrader: (4)

well, if 7.35x is with .075 already added, then stick with the 7.350's.
Going with the 7.375's would be almost .100 preload. Probably wouldn't hurt, but its a little on the high side, especially when your measurement is closer to 7.350 than 7.375