[Pampered-Z]

Probably a good package for the price, head porting will def. help the 305 make HP, I'm just not 100% sold on that company's claims.

For the 305 cam, there are two versions that are popular, 112 and 114 LSA. The 114LSA probably has a better chance of passing emissions then the 112LSA version. The 114 will probably make a little less top end power, but should have better vacuum and street manners. The 112 will certainly should better with a more aggressive idle. There have also been a few discussion on LT1 cams in this section you can look thru on some other cam options as well.

For the heads: I would suggest getting more info on what else is done to the heads. Appears they are all running stock size (diameter) valve springs and stock rocker arms studs, which would account for the lower price. (Stock size isn't a bad thing).

But I don't see any way they made those numbers on the heads as they are listed. 1st, they are giving port CCs and not flow numbers. Second a mild 383 with a 620-lift cam? And what was the compression ratio of that engine and other cam specs? I don't see any way those beehive springs support that big a cam. I would imagine they had some stout parts on that motor and spun it way up the RPMs to make that power.

Just to compare so you get an idea of why prices can vary so much. My heads were build a few years ago. At the time sold thru IRS but built by GTP. I don't have the cc size, but my heads flowed +/- 290/215. heads were built with 5 angle valve cut, Ferrera valves, bronze guides larger springs (dual springs - required additional machine work on the heads) titanium retainers, 10 degree locks, larger 7/16 studs ect. All this means I paid allot more for them, but I wanted the money spent once and I feel I got the best parts available and would last. GTP stage II heads that are very similar now cost over $2300

One last suggestion that is a pet peeve of mine. I'm not a big fan of Comp Cams springs, never had a good experience with them. But more important regardless of the company,,, I absolutely hate single valve springs, if a spring breaks, you run the chance of doing allot of damage if the engine "eats" the dropped valve. Spend a few extra dollars and upgrade the springs. Look at the difference between the single spring "beehive" and something like the Crane 99846-16 and you'll see what I mean.

Again, not to say those heads aren't good, I just don't know enough about them. Check around, and make sure you know what you’re getting; it's a big investment.

JB