I'd like to know y'alls opinion for a cam.
First of all, I have a stock head that I may replace down the road. Right now the engine has Pertronix electronic ignition with 45k coil and Bosch plugs gapped @ 40. I have an Offy 4bbl with an Edelbrock 500 and Clifford headers with dual exhaust going on shortly. I want it streetable, but don't care too much about mileage. I have 3.23's in the rear with a 4 speed. Let's say I'm looking for 2 "steps up" from stock.
Lastly, Isky or Comp ?

Thanks as always

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

It sounds like the Isky 264 or the Comp 264 would be about right for you. I have heard better reports on the Isky, but I have no personal experience. I have run the Crane 228 @0.050" cam and it's OK, but no that great. Similar specs to the two above. Use at least 9-9.5:1 comp and you'll get a good idle and around 2200-5000 powerband.

Lou

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Home of Slant6-powered fun machines since 1988

OK now I need to know if I have to do head work before I install the cam. Will the valves clear if I don't?
Do I have to change anything else (pushrods, etc.)?
Anything besides timing chain that I might as well replace while the motor is open?

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

You will not have any valve to piston clearance issues with this cam and the pushrods will also work fine.
Cam, lifters, Tming chain, a new fuel pump and maybe an oil pump seeing those items must come-out to do the swap.
DD