The E-Tec heads are a better head than the RPM's. The chamber is a better design and at least from the advertised flow numbers, have more potential out of box. There's certainly nothing wrong with them.
The roller cam will cost more b/c you'll have to buy lifters separately, but a roller cam of similar duration and lift (as compared to a flat tappet) will make more power at just about every RPM point than a flat tappet and you don't have to worry about wiping lobes or break in either.
If you're driving a street car with an auto and power brakes (and possibly highway rear gears), the cam in the kit you listed is a pretty big cam for a street 350 and power brakes might not work so well. I'd look for a cam with duration in the mid to high 220 range at the most (@ .050) instead of one that's well into the 230's. A Lunati Voodoo 60111 (219/227 duration at .050) would be a great street 350 cam in my opinion and would allow power brakes to run just fine and you *could* use it with a mild converter. Of course...this is assuming it's 90% street driven and you take it to the strip on occasion.
In order to say whether or not that cam is a good match for your car, you'd need to take into consideration what you're doing with it (street, drag...both, how much of each), rear gear ratio, auto or stick, compression, etc. Like I said, the roller cam in the Edelbrock kit is going to require a fairly high stall converter if you've got an auto (probably about 2500 rpm), rear gears of at least 3.73:1, somewhere in the neighborhood of 10:1 compression, and power brakes would be marginal at best if you've got 'em.
If you can afford a roller set up, that'd be the way to go.
You could probably piece together a package that is more tailored to your application for the same money the kit costs.
Last edited by hutchenc; 6th-June-2008 at 12:17 AM.