looking for 318 tips and advice

Hey so, I got a 76 Plymouth Volare coupe. AC car and has power steering, pretty sure its numbers matching with a 318, I believe I am the third owner, the story I was told was that the car belong to the guys uncle who bought it new in 76 and in i believe it was 84 they put it in the barn where it sat till he died and then the nephew got it and sold it to me, anyways i owned it for about a year n a half and well I was gonna leave it alone until someone with no insurance crashed into it so now i have put new panels on it and gonna paint it in the spring so now my plan is to build it into a fun street machine. so i was curios if yall have any suggestions on what to do with it? id like to keep the 318 but make it a lot more fun than the factory smog engine puts out. I am planning on just rebuilding the rear end and putting in 3.23 gears with a LSD and probably keep the 904 trans and just upgrade it since it seems that mopar parts in my area are kinda hard to come by. I aint got a very big budget and the paint job is gonna run me a pretty penny so if yall have low buck tips id greatly appreciate it
Well the LSD should make whatever you do...fun. if you dont have to smog test it...
Do an intake and 4 brl swap, up the exhaust to dual 2 1/4 pipes, install and "MSD" ignition, recurve the distributor with some lighter springs and you can keep the egr if you want.. because its just a milage enhancer and shuts off when you stomp on it. It only opens at cruise...Oh and put air in your tires, that helps too-B.Obummer.
After market air cleaner is a good idea too.
Flex or electric fan will free up 5-20hp depending on the rpm.