Darn right, Mr. Old School! When John wrote and asked what power pack heads were I just stared at the screen! (my '65 is three years older than I am, by the way). But hey, in this day of well built, CHEAP crate engines and ebay, etc., it's hard to justify all the machining and modifying of the stuff that you have sitting around in our garage- that's why I asked 'power pack vs 305' in the 1st place... In my SS was the mostly original 283 with the 2 barrel making 190 or so horsepower. Bought it in 2001. In 2003 I bought a junkyard 327 with the double humps and rebuilt the whole thing, did it right, am driving it since--- Cost me a bundle! Now it .060 over, the heads set for unleaded. It's not all old school, though- I have an edelbrock intake and carb, electronic ignititon, new headers...... BUT- the 283 stares at me on the cradle when I go into my garage, and this is my hobby for crying out loud! So I wonder as I drive away with my perfectly good motor, just like I did when I took out the perfectly good 283 6 years ago, what can I do to rebuild that and get a couple of more ponies, really rev the crap out of it, and feel -a little- better when high test is $4.50 again! SO----
1) Put bigger intake valves in the power packs
2) (by far the cheapest way...) swap the double humps over (the 1.94 valves clear, but I'll triple check along with the drop in CR)
---OR---
3) get a good, cheap, reman. set of 305HO's with the bolt holes and know they are good to go for probably way longer than I have the patience to leave them in before I get itchy for another project..... (Like putting the damn 327 back in because more cubes is the American way.....)
Does John want to buy the power packs that most probably need an expensive trip to the shop for $50 and $1,000 shipping? Cast iron is soooo heavy! Thanks guys, you are keeping me laughing this morning!