318 heads

AJ/FormS said:

For me,a streeter;
a 318/rebore is a money pit. If I'm gonna spend my hard-to-come-by coinage, I'm gonna go all the way to 360. Especially when there are plenty of Magnums to chose from that already have far better than 7.8/1 Scr, to start with and the cylinders waaay outlast LAs.
Sure a smogger-teen can do pretty well with big gears and loose TCs, but you gotta also factor the cost of those in, when you hotrod the teener. Whereas, at the same power-level, a 360 can easily get by with 3.23s and a stock TC, I mean 96mph is easy peasy for just about any 4bbl 360, even with the stock cam.
96mph is a W/P of 13.8 with an auto, so at 3400lbs is just 246hp. That's about what a 73/74 Dart-Sport was advertised to be; 8/1Scr, log-manifolds, and all. So, basically, drop in the 360 and 96 is a given.
But if you transfer all the 318 go-fast stuff onto the 360 and it will eclipse the 318 in a hurry, and you still haven't opened the 360 up.
The teener, IMO, just has too little swept area (652cc) to make any real low-rpm torque, especially when hot-rodded . And until recently, making compression was a tough thing to do. So the poor teener always needed gears and TC to help it jump off the line, and generally performance drops off rapidly with wind-resistance.
But if you open up the 360;then you instantly have ~737 cc of swept volume to work with, or 13% more volume. That's almost like swapping out a 383 for a 440 (14.9%).. So whatever coinage I spend on the 360 is gonna net me ~13% better results, than if I had spent it on a 318.

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