Dude sounds nice. Old Iron is built by our great grandads. You want to haul ass. Well, cool, what else are you doing with it "daily". It's about what you can live with, for instance I ALWAYS
remove a.c. parts. If it has power steering you can run the AGR
pieces/or switch to standard steering gearbox. For puttin' power
where it's doing good, you can run wider tires,and also do a air shock or air assist like bags that fit inside the coil spring and separate them so you can preload one side or both.Also can go
w/power pulley system w/sepentine to help keep efficency when
you underdrive acessories,but would also go to like a edelbrock or weiand aluminum water pump,and a really high amp alternator.
Say,like a police 175amp or even an 4x4 200amp, at least no less
than a 140 amp. Also with power pulley(s), prob'ly want a pusher
electric fan or switch all together to electric fan or fans. Small block Chevy so a windage tray will free up ponies , a valley baffle
will help. Switch to a electric fuel pump.Rig a Yblock so you can remove the fuel pump pushrod, then if you burn up a pump(not likely)you can put your mechanical pump back in place easy. I don't know your cam specs so beefing the bottom end is important. You can run studs in your main caps just NOT on the two bolt locations at each end or on the outside bolt locations if it's a 4bolt main , so you can use studs where you mount the widage tray, not near pan rails unless you line hone it. Also a rear
sump baffle will be handy so when you accelerate oil don't climb
into the crank. Headers, a good set preferably ceramic/metallic coated, or if your poor dipped in chrome still helps ,too. DO NOT
go with TOO much carb. I am throwing out ideas,but have no clue
what you want.Haul ass is relative to use(s) of vehicle,what you can live with(like I said),and what you want to spend.