318 low budget build

Okay.....As far as my ignition I have the full Msd system. From the box to the plug wires.....It has 36 degree total timing....The headers are hedman headers dumpin into 2 1/2 pipes.....3:23 gears for now....Thinkin of puttin in 3:91 before I ship the car this way.....Converter it's between a 2500-2800....Cam I'm not sure...Has a slight lope...One guy said it sound like a RV cam...Comes in round 2800 rpm......Demon 650 carb...Bored .30 over.....Nothin too powerful....Not the best off line but will chirp tires an give a decent burnout.....People say it sounds like a 340...My question was about changing the heads from 360 to the 302 cylinder heads....I hear/and feel in the seat that the 360 heads are not the best heads for the 318....I wanted a bit more compression....Don't want it too high...The gas here in The Bahamas is the highest I think 89, although we have the new mercedes and bmw runnin on the gas.....So that's one limit there wit compression....I hear/and read that those heads pose to be a better fit.....What's ya feelings on usin magnum cylinder heads? Also round here the speed limit(legally) is 45 on the "highway"....Alot of stop and go traffic short streets and a heap of stop signs.....I only wanted to keep the shortblock cause it's still a good bottom end....Or give me an example if I get a 360(from the boneyard) and build that what kinda money I lookin at.....