Finally, got my 5.9 Dart to the track. It went well, then it went to hell.

LXguy said

Here's something that I find interesting:

Stock Magnum pushrod length 6.92

Comp used to sell a kit to convert Magnum to stud mount rockers (they still sell the studs and guideplates- pushrods are same as some small block Ford, rockers are Chevy).

Crane used to sell a stud conversion kit that said it used the stock pushrods (they had inserts in the guide plates to avoid metal to metal contact.

Pushrod length sold with this kit: 6.8

Pushrod length Hughes recommends for their standard stud mount rocker conversion:7.05

I just think its kind of weird that the hughes recommended PR is longer and the Comp is shorter.

Click to expand...

I think what amazed me more than all this ****, was how my Mopar roller rockers that were blue, actually turned green! hehe

I am not amazed at the multitude of recommendations regarding pushrod lengths. For the 1.65 ratio magnum shaft rollers hughes sells, they recommend 7.45 inch for the magnum engine usinng a roller cam and those are the shortest length they sell for these rockers.

You'll find that a lot of different rockers come in at different heights once the stem to roller pattern is established and that is the basis of their recommendation usually. but that's only where things start.

when you're dealing with shimming rockers, block and head decking etc....that **** goes out the window.

I have a set of the 7.45 inch pushrods and will try them because I think I might be very close the way my heads are shaved and how I had to shim up the rockers. but we'll see! I might be completely wrong. I have a checker so I guess I'll find out.

If I have to get new ones it just means I'll get some mantons.