Stock 318 Roller Conversion

[72DartSwingerV8]

I'm currently using stock 318 72 heads that have been bored to 1.88 intake, 1.60 exhaust, and milled a little. The lifters are hydraulic and my cam is a Mopar Purple Shaft for the 340. Is there any way I can replace my rocker arms with a roller rocker set off of Magnum heads? What length pushrod do I need? Thanks for the help.

 

[70aarcuda]

magnum heads use pedestal mounted rockers.....and your 72 318 uses shaft mounted rockers....so the answer is NO.....

 

[72DartSwingerV8]

Ah bummer, are there any cars that have shaft mounted rockers that are roller that could fit the 318 heads?

 

[1970Duster]

No. The only real way is to buy some roller rockers. I have comp pro mags

 

[rumblefish360]

Places to look for roller rockers would be Hugesengine (.com) Crane and Comp Cams. There offered in the stock 1. and the higher 1.6 ratio to match the Magnums ratio.

 

[72DartSwingerV8]

Alright thanks for the help guys. If I buy an aftermaket roller rocker set will the pushrods be stock length?

 

[mopardude318]

no they will not. you will have to measure for new ones...

 

[72DartSwingerV8]

Thanks for the clarification mopardude318.

 

[omahamoparguy]

yeah you need to buy some roller rockers for the shaft. That being said, the original rockers were really not that bad of a design. they were extremely strong and not really that heavy. the only downside would be the ratio and the non--adjustable factor.
I just built a 318 for my pickup. I used the original rockers and shafts from 1975. they looked like new almost! (after they were washed at the machine shop) JMO...