absolutely ! between that and the headers, the little 2 barrel engine is much more alive and awake. it really likes the 4 barrel, less than 2 hundred bucks total for the swap.
Exactly! Once you get rid of the restrictive single exhaust, and then let the intake breathe with a dual plane and 4bbl carb, those 318's really come alive, even with a stock cam.
Then improve the cam if you need more than that...
A good double roller timing chain is another good improvement. Especially when you get rid of those cheap stock nylon timing gears that chip teeth pretty easily.