yeah 320 by itself is sortof ambiguous; you gotta include at what lift.
Like, IIRC, the old PAW 340 cams were around
302*SAE @.001, which was around
268* @.008 tappet rise, which was around
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I ran that Chrysler 340cam in an advertised 8/1 stocker, with a 4bbl, in a 71Monaco automatic with 2.94s and tall tires. Great passing power. But otherwise a real dog combo. I put the 318 cam back in and installed a 2800convertor instead, which for a family car, was way better.
I mean even at SAE, 320 is pretty big. There's not much left for the compression+power cycles; unless you run solidlifters but you didn't say that.
I can tell you for a fact, the purple shaft 508 on stock block/heads don't work. EDIT: In a street car.
I'd like to agree but I haven't tried it. I did however run it in a 360/4speed/3.55streeter, at 11.3Scr, and didn't like it much. It was only in the engine one summer. So I had to give you a like, lol.
That 292/292/108 ; I measured at around 249*@.050