Edelbrock aluminum heads

ir3333 said

Could make a good discussion. But if the stock heads stall out around .480 lift can you get 425-450 with a big cam and stock heads? Long duration would surely help but it would have a tough time at lo rpm.
Hang on from 3000 up!

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That’s exactly how it will work. But yes. Stock 340/360 heads tend to have peak air flow at .500. The old Crane Cams catalog was chock full of cams around .500 lift with a wide verity of durations. I am about to fire up a 5.9 with just headers, rpm intake and a 750 AFB with a Crane cam of 236/.497-108. The 1.6 Magnum head rockers add a bit of lift to .539.

You could have found several cams like this with duration mirrored and split from low 220’s to 240 durations @050.
Another example is the MP Purple 292/.509. It’s about 248@050. A bit of a big hyd cam for the street but easy to work with. I used on in a 10-1/360 and stock heads w/a 4spd & 4.10. It’s good for an easy low 13 second 1/4. 12’s if your car is really light.

The lack of torque is overcome with steeper gears & the obvious sacrifice of interstate driving.