273ci thoughts?

66fs said
First, I'm nor talking theoretical mumbo jumbo. My brother and I ran 273 Barracuda's and put 500,000 miles on them. He still has his and my 64 was replaced with the 66 only because of accidents. I have had a 71 340 Duster and a 73 318 Dart. Still have the 273 Commando Formula S. If one is starting with an nice A body with a 273, imho there is no need to swap motors. All one needs to do is freshen it up, get some 340 valve springs, a solid cam (260-268 and .425-270 lift) from Isky Racer Brown etc and it will make an instant high revving 260 HP engine with 2 barrel pistons. Nice street manners and good mpg. No extra motor, no new transmission, no new rear end, no headers.

Sorry 273, I see a lot of mumbo jumbo.
Bottom line, an extra 45 cubes due to bore size will make for a more powerful engine in HP and TQ across the board when otherwise equally equipped. What ever you do to the 273, I get to do to the 318. The 318 wins.

What are the chances of finding a 67 318 in good condition? The only one with a forged crank and the good 273 heads. Most are very low compression absolute dogs, but that can be remedied with pistons anyway. I don't like Hypereutectic pistons. When they fail they take your whole engine out. MOPAR cast cranks are not a problem as you know. It is just a plus.

The chances? I’d call it even. And that chance I’d call piss poor. That is a 52 year old engine. I stated that the low compression of the 318 can be fixed by a low dollar head killing which is worth the cost of indeed you “NEED” that extra compression.

To turn a 318 into a 340 is easy, used to do it all the time. No need now, as for the most part, I don't do work for anyone and I have 340's. You simply put the good stuff: 360 heads; intake; carb; cam; valve springs; high pressure oil pump spring; windage tray; and double roller timing setup on a 318 with at least 9.0:1 pistons and good rings. Just like they did to the 360 when they retired the 340. Bore the block as little as possible, .005 .020? Bore size is not as important as head flow.

You can turn a 318 into a 340 easy?
Oh please due tell! I have yet myself find a 318 able to accept a over boring of .130. Is it possible? I just haven’t seen it.

Now about head flow. I agree. How that enters in the cubic inch engine vs. engine discussion when basically, from where I stand, they use the same head. The particulars of the exact head castings used on the engines throughout there run years and the flow rates of these heads I don’t have known in my head or even bother to keep on paper/lap top/ stone carvings.. LOL!
As I said, “Basically there the same head.”

Do you have a reliable chart that YOU personally flowed? A trusted friend? Some wacko internet source?