oil pump selection

Sedanman said

A friend swapped a Magnum in his 68 valiant and said he used a HP pump instead of a HV. I assume he did that because of the roller set up?

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There is not explicitly an HP pump for the SBM.... you can put the higher pressure relief spring in either the STD or HV pumps and each will become 'HP'. The roller and non-roller pumps all interchangae, but I cannot tell you if the roller engine oil pumps all came with the higher pressure spring; you have it anyway if you have a Melling pump.

BTW, look at you pump and see if the casting has M72 or M72HV on it.