AC Delco HL121.........the body is a little shorted than the Crane ones but roller tip to plunger depth is the same

Thanks!

Did those lifters along with the new rockers allow you to use the same rod lengths?

yes, same push rod

Thanks!

you need to check all of this when doing the assembly, rocker geometry, make sure the lifter body does not go below the top of the dog bone when the lifter in on base circle of the cam

Understood.

I was searching for lifters and saw you and SB post about this AC Delco lifter. Nice to know all parts in the assembly. Did you have these engines dyno'd?

no need to dyno, stock 500 EFI's

Don't know how I missed this thread, those would have been a nice upgrade for me. Does anyone know the dimensions for the oil cooler? While doing some hard runs last week, my oil temp was running a too hot. My STB motor cooler was replaced about 4 years ago, not sure why it is not cooling the oil enough. 230+ measured at the filter after about 5mins WO.

I just used these lifters in my 500EFIs also...work great...hard to find though, I bought mine from Eddie Young, he said they were his last set a few months ago.

there around 3x20........you may have some blockage