Another opinion question

Whats up man. Dont know if this'll be worth anything to ya but I was in a similar situation back in High School. I had a stock-as-a-rock 1970 Duster w/a 318/904/8-3/4" drivertrain. It was so slow that some dude put a whoopin' on me with his 65 Barracuda... with a slant six! That was pretty embarrasing for me, but kudos to him though! (I found out later that he had a cam, intake, carb, ported head, headers, exhaust, a 4speed, & a 3.91 sure grip in that thing LOL) Anyway, this is what I ended up with before I sold it about a year after I graduated High School in '95.

Motor:
600 cfm carb (vacum secondary)
Edlebrock Performer intake
Stock heads (rebuilt, 3 angle valve job, ported-matched to the intake manifold)
Hooker Headers (bought em used, I think they were the Comp as opposed to the Super Comp headers)
2-1/2" x-pipe (I was definitely able to tell the difference between these & an H pipe btw)
Dual 2-1/2" Flowmasters (2-chamber)
The cam was stock

Tranny
Shift kit
Replacement gearset with a lower 1st gear (this really made a difference off the line)
Mild converter that I bought used off one of my buddies that swapped over to a 4 speed gear box

Rear End
3.55 Sure Grip

Suspension
stock /6 torsion bars
90/10 front shocks (looking back, I cant beleive I used to drive around with this set up... with the stock drums no less!)
slapper bars on the back
pinion snubber


Weight Savings
'Glass fenders, hood, bumpers & deck lid
removed the a/c & heater, switched to manual steering, switched to 15" Big-N-Little Centerlines

The moral of the story? I was pretty much stomping on the 5.0s & Camaros (that didnt have any major work done) in my town. I never put it on the track but id say that with a pair of slicks im pretty sure it would have been in the high 13s/low 14s. Interestingly enough, the buddy that I bought my converter off of ended up beating me every single time from the time he swapped to the 4speed & our cars were set up EXACTLY the same up to that point. Ever since then, ive never owned a Mopar with an automatic.

Anyway, I dont know how hot of a street car you plan to have but if your thinking about going much faster than this, I suggest you use a 360 as your foundation. Besides the fact that you only have to change 1 of the motor mounts to make it fit, youll have better head & intake choices & every mod that you make will net you more power gains over the 318 because you'll be 42ci ahead of the game which is pretty signifigant.

hope this helps out!