Stock Push Rod Length Options

[R Dub]

Can anyone verify what the stock push rod length is for these cars?

From my research the stock length is 271mm and the stock part# 021-109-301-A. I ordered 2 of these to replace the 2 bent ones that I have. I have no history of what push rods were in my motor so I just assumed they were stock but it doesn't appear that way as my 2 new ones are about 1/4" longer than what was in there. Just want to verify before I go buy 6 more stock rods.

[brant]

if you are changing the cam and lifters...
a full rebuild then....


you really need to measure and cut the correct length of push rods to take full advantage of the valve train/cam geometry

this is a precise measurement
the length of the pushrod effects the ratio of the rocker and how much valve lift you will get from the cam. skipping this step means you likely have too much or more likely too little lift. You essentially do not get the performance out of your cam lobes and could of just left the hydraulic cam alone if you don't perform this necessary step.

you need to read the articles on measuring push rods.
you will need an adjustable push rod to take measurements and then
transfer that measurement to your new pushrods to cut them to the correct lengths

you need a dial indicator, a mounting base, a timing wheel, an a large set of calipers to go longer than a push rod

this is a 4-8 hour job that is completed during re-assembly
you should also have already purchased the correct 1.7 rockers with the correct swivel feet. Modify the rockers to accept the swivel feet

do it right
its time and money, but a motor rebuild is no place to cut corners.
someone here can likely loan you some tools, or walk you through the process.

there are good tech articles, including Jakes that can help