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.

Use the 915 heads. Do a little porting & a little milling then a touch of camming and bingo you have met you goal.
Moparoffical has my 915s flowing 260 cfm at .500 lift.
Btw all LA motors have rocker arm shafts. It's usually what is mounted to them that may be differant.
Freshen up the 904 and put a correctly wound front clutch pack spring in it.
Use a b&m 360,904 flexplate and run a neutral balanced torque converter behind it.

Now that we've derailed this thread real good. Go back to talking about the heads.