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I don't understand why you would need longer rod for an agressive cam , I used a .560 lift cam with stock rods.. need to keep the stock one for stock heads for right geometry....

The Crane roller rocker are the best for this application..you can find some on ebay...I'M using them myself in my stroker
Dan



if it's a reground cam, with a smaller base circle, there's a good chance the stock pushrods will be too short. there's some comp pushrods that are meant for a 302 ford that are about .020-.036" longer than stock magnum ones (depending on spec I've seen for magnum pushrods), for about $30 at summitracing.

http://www.summitracing.com/parts/CCA-7828-16/

I used them on mine...worked good

as far as roller rockers, any small block chevy rockers will work, with the proper studs (5/16" bottom thread, with the proper 3/8" or 7/16" top threads). personally, I'd probably look at the scorpion performance pedestal mount ones for an AMC, since the magnum rocker is a carryover part from the 290-401 AMC motors, and scorpions are all US made down in florida.

http://www.summitracing.com/parts/SCC-SCP1097BL/

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