Pushrods, how do I measure for...

MAPS said
Wow, thanks (Discharged) I will ask the guy who is looking after the car now add I'm basically an idiot when it comes to "hands on mechanical" issues....
But we bought some tool that looked like a Pushrod that screwed in on top add if it would extend higher with the top screw and this tool (all this is mechanic talking to me, I'm lost) would get longer as you turned the top part...i can see it being called a ball ball etc but this tool itself bent so he is ordering another to measure it again. (This time ordered 2 lol) I think he screwed it to high and that's why I bent ? Maybe he should have gone in small increments but that again is not telling me how he will figure out what's the exact measurements.. I know it's supposed to measure between 7.8 to 8.Something...
The car has crane cam roller rockers with a 590 solid cam..(mopar cam )
Talking to a grant here also who I hope will help me out.

Reason we are changing them is they were heard making some noise and when the covers were taken off we realized they were loose... Just lucky to see it before anything else could have happened. Car is running rich also .. Can this be the reason ? Car ran real well and is barely a cpl'm of thousand miles on a fresh rebuild.
Have W-2 heads and was thinking of swapping these 340 heads but now I'm getting nervous as I thought it was just a few bolts here and there, swap the heads and of I go..... nope!

Thanks for all the help thus far.

Ok I THINK I get what your asking. First, like bOb said, put checker springs on the number 1 cylinders valves. If you are using W-2 heads, the offset of the intake makes that pushrod about .060 or so longer, so I always buy an intake length pushrod and an exhaust length pushrod. I'm just anal about that stuff and .050-060 is a bunch to me.

Once you have the soft springs on, roll the engine over to TDC#1 cylinder and put your SHORTENED checking tool into the intake lifter. Set your rocker gear on and just snug it down. Screw th adjuster into the rocker so NO THREADS ARE SHOWING. You should have 9/32 inch sticking out, or about .281 or about 7 mm if that's how you roll.

Now, just raise the screw on the checking pushrod until it just touches the adjuster. Take it back apart and accurately measure the overall length. It is the overall length if it is ball and ball. If you use cup and ball it's still the overall length, but you need the EFFECTIVE LENGTH, and any good push rod company can take your OAL and get the effective length.

Do not forget to subtract you lash from whatever measurement you get. Then you know the adjuster will be where Chrysler wants it.