Input for 340 upgrades

Thank you all for your input.
A lot to digest. I do like the idea of the Trick Flow heads after checking them out. Just don't know how easily I could sell my Edlebrock 60179 heads.
Still in the boxes. Had a machine shop check'em out. Said they were in very good condition. I also have a 72 340, I could sell my 69 340 & put the money into the 72. Have it macined, bored & build from there.
Any who, thanks again!