64 barracuda 273

I’m in the start of rebuilding my 64 273 , i have 2 questions is i have 318 heads available with a 4 barrel intake from a 67 barracuda
I did not get any numbers off the heads yet but is it worth doing ? and will it increase HP at all ?
Any advice will be helpful

Shippy, is this the same car you have for sale here on FABO? Your avatar picture? If so, I would leave it alone.

[FOR SALE] - 64 barracuda 273 auto numbers matching asking 22,500 plenty of new parts