6.4 hemi rocker arm material?

[Twister73]

I'm considering a 6.4 hemi swap into my 73 Twister Duster manual trans. While reseaching the 6.4 some said if I change cam, lifters and heavier springs I may have stock rocker problems. So, what are the stock rockers made out of? My internet searches were nada...

 

[royslead]

I think it is a high pressure powdered metal, similar to the modern connecting rods.

 

[408 swinger]

Of you're talking solid roller cam spring pressures, yeah they'll snap like twigs. If sticking with juice lifters, they're plenty strong. As to what they're made of, royslead got it.

 

[Twister73]

Of you're talking solid roller cam spring pressures, yeah they'll snap like twigs. If sticking with juice lifters, they're plenty strong. As to what they're made of, royslead got it.

Yep, Hi Perf hyd lifters. Thanks guys!

 

[408 swinger]

Yep, Hi Perf hyd lifters. Thanks guys!

For what it's worth, I twist my 6.1/426 to 7200 regularly with factory shafts and rockers. Also use the Stanke collars and hold downs.

 

[Twister73]

For what it's worth, I twist my 6.1/426 to 7200 regularly with factory shafts and rockers. Also use the Stanke collars and hold downs.

What cam, roller lifters, pushrods and springs are you running? I'm looking for 7000 with stock pistons and rods.

 

[408 swinger]

Hughes cam, Johnson lifters,and PAC springs.