Questions
Any suggestions on a cam?
uhh... bigger-er?
i'm sure that somebody here on the forum is running a combo and has the recipe but i'll throw out a very unscientific WAG on it. something mid .500 with duration at about 230.
the caveat here that you can't go more than .550~.560 lift on stock pistons (note: that is total lift
with a stock 1.6 rocker), and if you change your head gaskets for more compression or have any other parameters changed (block machined, aftermarket heads, heads cut) you will
absolutely have to check valve to piston clearance.
i think a stock 5.9 bottom end is capable of churning out 450, but getting there will likely mean compromises in streetability. on the one dyno test that just touched 400 they used a very similar cam to yours and an air gap but topped it with a holley 950. and headers, you'll need those. i think with a single plane and big carb, you get there no sweat but i prefer a dual plane and something more sensible in the air fuel metering device department.
you probably can get there, or nearly to that coveted 450 with a bump in the cam and breathing on the heads a bit. which, i mean they shouldn't be run OOTB
anyway so what's a little more massaging while they're apart?
just keep in mind, that even though you'll get the number it's going to shift the power up higher into the RPM range at the expense of lower end and useable midrange.