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Discussion Starter #1
67 with a front sump pan..anyone know if there are any options on pumps for this or just replace it with the m73 that was on it,looks like the m73 had tiny bit of grinding done to the top of it so not even sure if it is the right pump? thanks cranker
 

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M73 is your only option with a front sump pan. You could have Paul Wright tune it up for ya when he's ready. I'd put the high pressure spring in it. The grinding some one did for clearance for a 350.
 

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ya i think i will just copy the grinding that was done to it,just bought a new m73,any idea what spring to get??
 

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ya i think i will just copy the grinding that was done to it,just bought a new m73,any idea what spring to get??
you can get the high pressure spring from GM, its what they call the Z/28 spring. It's either white or yellow I forget. All the books on small block chevys talk about them. Spring produces 50 psi in a stock pump.
 
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