Sure, many will be interested in loaded aluminum heads for 820. But this thread isn't about where to buy, there was a thread on that last year, their big sale. This thread is about, "putting equal or more into iron heads vs aluminum".
Lets visit REALVILLE.
- My 318 heads in my '74 Duster. New valve springs for 50 bucks, and new exhaust valves for 48 bucks, and 10 bucks for new umbrella seals, 20 bucks in stones to port. For my engine, for my build, 128 dollars and some winter time porting, I got what I wanted. Didn't want 800+ dollar heads!
- I also bought remanufactured, fully loaded mag heads for 300 bucks (pair). They were meant for my 5.2 mag. I changed my mind, added 230 bucks for Hughes spring kit, and 60 bucks to have Odessa's fix checked out, and 10 dollars in stones. That's 600 dollars all set for up to .550 lift. You will be over 900 dollars in your aluminum heads with springs. That's still 300 bucks cheaper than your heads with new spring, and even more if you take yours to a machine shop to be checked out, and I'm not sure you'll flow hardly any better, IF better.
- So tell my why I'm stupid in these two builds??? This is why the decision will be made case by case scenario.