John's 1.74 ratio are for aluminum heads only.  That's why they are so expensive.

Factory rockers came in 1.43 and 1.54 ratio.  Aftermarket are available in 1.6.

A set from a 239 will fit.  They will be low ratio.  Plan on a rebuild / refurbishing of used ones.


Lawrenceville, GA

I guess I need to buy rocker arm assemblies for my 292 rebuild.  I see Mummert sells them for $950.  His are 1.74 ratio.  I have no problem with good used parts.

My Question:  Are the used ones pretty much all the same?  Are there different rocker ratios out there?

I found a set on ebay off a 239.  Will these fit?

You guys are the best.  I know I am going to get all kinds of info on rocker arms.