my 340's heads on my 273????

Aloha!
you all do it...drive and day dream about your car...well it happened again today....hopefully soon (December) I will rebuild my barracudas 273. I started thinking...how do I rebuild her? Engine wise? Stock, mild, radical? I lean hard towards mild-just above stock. (The car is completely stock and original...for the most part...but the engine is tired)
Then I started thinking...hmm I wonder if I should get Edelbrock Heads for my 340 duster (Currently J heads)...then slap the J's on the 273?

Is this stupid? worth it? do-able without hacking at fenderwells etc?

Or scrap that thought completely and just rebuild the 273's stock heads keeping her all together.

dang too many possibilities...ahhhhhhhh.....FOCUS!:read2:

chime in...:-D

Mahalo Mike