badazz81z28

iTrader: (6)

Seems nobody knows on the CF, anyone know Morels spec for preload on the drop in 6504 LS lifters?

I found a generic instruction sheet, but not part number specific

1973 STEP A SIDE

iTrader: (4)

.045 to .060. Probably off the same sheet.

JakeFusion

iTrader: (7)

.045-.050 if they are similar to the 5315s with Aluminum block and heads.

.030-.035 iron block and aluminum heads.

From what I've seen.

badazz81z28

iTrader: (6)

Looks as though it won't be easy. With my push rod checker I get about a little over 17-1/2 turns to a little less then 18 turns from valve to valve. If I go with a 7.750 pushrod I'll have as much as .065-.070" preload as if I go with the 7.725 I'll have as low as .035-.040"

Theres no middle ground without going custom. Is it better to have more then less pre-load?

1973 STEP A SIDE

iTrader: (4)

What head are you running ?

badazz81z28

iTrader: (6)

Stock LS7 heads that were rebuilt and ported by Texas Speed. I think they milled .035" and there is a stage 2 cam in it. Not sure if that cam has a smaller base circle then stock

badazz81z28

iTrader: (6)

thoughts?

Cstraub

iTrader: (1)

The lifters has between .139 and .141" of travel. On an LS engine depending block and head material you want between .040 to .060" of pre-load. An all aluminum engine will be at the .060" side of things.