street/strip 360

first off I would think you want something like this as your final project: http://www.slantsix.org/forum/viewtopic.php?t=27196&highlight=buster. I picked it up when I was 17 and had it painted in 5 months. I'm 20 now and have leather seats and EFI, but you got some time.
First my aunt's Mach 1 Mustang with a warmed over 351 C has a hard time clicking off 15's with a set of 4.11's. Sadly enough I'm still argueing with my roomate that his zz4 69' camaro is going to have a difficult time getting into the 13's but hey, well never know if he never races me.
To start with how much are a set of J-heads nowadays? I metion this becuase I usually get a set of other heads and get them ready and strap them onto the motor. I have full faith you could port and polish a set with reasonable results and dress the heads for a set of headers. You could pull and replace the heads at the same time as an intake and carb replacement. I have a hard time choking header prices for their benefit. Since they are a multiplier of what your engine flows would be better to get a head flowing than not. Bigger valves, 3 angle and guides shouldn't be expensive if you have a good shop around. Than shop for a intake on ebay and rebuilt carb or something I would think you could bring this in for $500-800??? Headers need to be followed up with a full exhaust system not a path I would eagarly follow. Just another path...