Push rod question

[usraptr]

Probably a stupid question, but I'm not terribly knowledgeable about this kind of stuff and I forgot to ask the machine shop.  Had my 440 block parallel decked to 5 thousands.  I'm going to run Promaxx aluminum heads with felpro gaskets and the stock valve train rockers.  Since the deck was blocked, can I still run the stock length push rods or am I going to need shorter push rods?

[1 Wild R/T]

I'd be more concerned about the height of the promax heads than a mere .005 off the deck... Steel shim head gaskets are .018-.021  composite head gaskets are typically .041-.051 & hydraulic lifters have no problem compensating for that... So the milling of the deck is a non-issue....

[4 speed fish]

You will need to get a push rod measuring tool.Youtube has videos on how to use it.If your pushrod length is not correct the engine will not run right or worse you could damage  some valves or rockers.

[Chryco Psycho]

I have never used promax heads but I agree there is limited adjustment inside a hyd lifter to compensate & unless the rocker shaft is exactly the same height as a stock head you will need a custom pushrod , I would contact Smith Bros in Bend Oregon for new pushrods their servie Products are unbeatable

[usraptr]

Thanks for the suggestions.  I saw the push rod tool advertised at Summit.  If I need new ones I give Smith Bros a call.

[734406pk]

If you are running a hydraulic lifter/cam remember to include a .050" lifter preload (general spec). Pushrod length= zero lash + .050".

[Strawdawg]

Being old school,   I usually aim for a preload a bit less than that and set it around 0.030" for a street engine.  The factory was less precise and 0.050" is probably not uncommon on some engines

[usraptr]

THANKS STRAWDAWG AND 734406PK

[734406pk]

  Good luck with your build!!