318 head porting for the average joe

OK this is what I've got. ;)
I need a little advice from whomever,
1968 Barracuda has original 318 block with 273 (315) heads on it. Strangely they have rocker shafts and an eddy torker intake bolted to it?
I also have a 360 53006921
and more heads 714 castings
and 360 heads 3418915-H
I'd like to build a streetable easy (cheap) 350-375 HP motor.
Before I started reading this thread I thought the way to go was the 360 with the 915 heads but now I am not so sure.
I do not mind doing porting (learning)
So with that in mind and what Ive got which way should I go?
A few things that I have to consider transmission is a 904 and I will be keeping it that way with a 742 8.75 rear with 323's I am thinking also about balancing as well the original 904 torque converter may need to be rebalanced if I go with the 360??
Any thoughts/advice greatly appreciated. Thanks all.