That's ok. The headers are a luxury and I didn't know you already some. So running those is fine.
Ditto with the carb. Didn't know you had that already. I just detest Holley so much for the criminally ignorant tuning tips they put out and the fact that they hamstrung other carb manufacturers for decades, and the fact that Holley was slow to even begin to admit a choke was essentially useless and getting rid of it was a good thing. Just my personal disgust with the entire company history since I've started doing car stuff.
I'd use the 596 heads, your old school 284 cam (that's a good cam BTW, despite all the hate for it because it's not a "new" lobe) and your 273 rockers and the Stealth intake.
