Some other facts .
As you preload the lifter the geometry acts like you have a shorter push rod in place.
Lifter preload is done really for just two reasons.
1) is to maintain a noiseless valve train over a lot of miles as the valvetrain wares and valves recede.
2) so if the valves ever float the plunger clip ( if it’s a round wire type ) is not be forced out .
Longer push rods can make the rocker tip contact pattern move more and more to the exh port side of the head, shorter ones will do the opposite and might create rocker body to retainer clearance issues.
For the least amount of leverage action on the valve you want the narrowest patten on the stem top , if you can not achieve this, but end up .020” to .035” on one side or the other I would not consider having such a deal breaker for running that push rod length, and especially if a roller tip is riding on the top of the stem.
Also note as you play around from the stock push rod length of 9.145” that you will gain or loose lift so you really should be using a very light checking spring so as to not overwhelm the spring under the lifter plunger when rolling the cam around.
Also consider that when in use even at only 5000 rpm the valvetrain will deflect about .010” to .012” and that amount of lift will be lost.
If your lucky and play around a lot with push rod length you can compensate for this loss and enjoy all the power you can was meant to provide.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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