Huh? rebuild 360 heads, change both (intake I presume) and that 318 will come to life..so use 360 heads and intake..and lose quite a bit of compression?[/QUO
Sorry, I should clarify I was referring to The 318 engines I use that are pre 1970 with 9.2 compression. not the 8.0 1970' and newer type. The 70's got worse mileage, and were slower than the 67-69. I owned a brand new 69, and a 70. Think about the 71 340, with 9.5. and 2.02, even bigger than a 360 head. the later engines got smogged up beginning in 1970. In my opinion, larger ports and slightly larger valve sizes don't hurt anything. 318 engines have the same stroke as a 340, but a flatter piston. if you look at a 69 318 piston and a 71 340 9.5 you can hardly see the difference. a 69 318 will out run any 70 and newer 318 in the same car. now a 273, you would lose a lot of low end. I put this combo on my 68'charger with stock 340 Intake, and 68 340 exhaust. That car ran like a million bucks. I stock all the 67-69 engines I can find, for this reason. my brother was so torqued back in 1974 that my 69 273 dart would run with the 70 318 as fast as he wanted to go, and not beat me. 18-20 mpg too.:profilel:
