pushrods

what would the approximate pushrod lengt be for a -.500 45 degree kb block with old brad fuel heads and blue keith black stands and std height lifters?i have fat head and fuelhead pushrods all mixed up an trying to sort things out but no engine to check it on.

 

This is a hard one
I have standard kb block Brad 3 old fuel fat heads
11.8 intakes 12.675 exhaust

 

Pushrod lengths

In my experiences with hemi and rocker arms, even a few thousandths pushrod length difference CAN make a difference. On one engine, .050 difference in length was all it took to A: rub the pushrod sleeves in the head and B: miss the little bit of oil available and ran dry destroying several pushrod cups. Do NOT think that the 1 1/4" adjuster will "fix" the pushrod length. In my case, I had to have the pushrods made to such a length that I can BARELY get them under the rocker and adjuster and the adjuster is withdrawn all the way BUT I have had no further oiling or rubbing problems.

That being said, I would suggest to not just buy what might be close or works for others but to assemble your combo and MEASURE the longest pushrod that will fit. Heck, cut a ruined pushrod in half and make a threaded insert to find the proper length. Been there and DONE all of that!

 

pushrod measuring kit

Hi,

Manton sells a pushrods measuring kit for I think $40. Worth the money and will save you a lot of hassle and burned up/thrown pushrods.

Personally I would not try to guess because if the heads or block have been decked at a different height than anyone else's or the stands were cut a bit off you will have very different lengths from the next guy.

Best wishes,
Trevor Sherwood

 

I would also recommend getting a Manton Pushrod measuring kit or make such a tool yourself - it`s really easy.
We bought our pushrods as a "Do it your self kit" from Manton (Series 5), used our homemade tool, and made our own pushrods here in the shop with the help from a hydraulic press.
Really easy, guaranteed to get the right lengths and no waiting around for someone else to do it for you.

Gather the guys, some beers and it`ll be a nice evening

 

have a bunch of pushrods for fathead and fuelheads all mixed up, just trying to sort them out so i figure the difference between them is quite big.