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There is a wisdom here that's hard to argue with. Surface , guides , seals , valve job and springs put you 1/2 way to a better head for sure. If I had to port them , it would be a home job because spending for it makes no sense unless you are playing in an iron head class and have to use them.

You know about using AMC lifters , as you will be using push rod oiling with the Magnums....right ? Different pushrods too. I am not sure a solid roller is worth the extra expense here either. If I did go that way , I'd probably lean towards a hyd. roller. With a solid roller , you will find the...

I guess whether or not you want to convert to roller rockers depends on how much spring you'll have. Big cam = bigger spring load. Hyd. roller needs more due to sheer meat of lifters , regardless of grind. Stock stamped LA rockers hate spring pressure , and I don't think Magnums will be a whole...

P 4876049 or any production Magnum gasket set.

The top P/N will give a magnum head adjustable rockers. The bottom is for an entirely different animal.....roller rockers for AMC / GM etc. You will need AMC lifters and oil through pushrods ........ I don't know of any " kit " to adapt Magnum heads to an LA block , but there is a list of parts...