5.0 mustang build up where to start

[canukracer]

would like some info on good bang for the buck addon's ,it's a 93 lx 5.0 with K&N filter ,3.73 gears, just put in an off road x pipe stock headers,was looking at an pro-m maf 77 and larger tb 65 or 70mm?can get gt40p heads for 412 each canadian dough, intake not sure of? cobra or trick flow street the cobra is old stuff hoping trick flow is better and it is cheaper too,ican swap my old 86 5.0 headers unequal set or should i go for an new equal set? i was saving a chip for last, brand? can i still make good power with the stock heads? thanks for any help this is a great forum for me it helps an old newbee