318 or 360?

-
How about swirl Port heads on the 360?
What you add with small closed chamber and a increase in compression, the smaller valves and port flow will make it all go backwards. Keep the #302's for the 273/318's.
 
How about swirl Port heads on the 360?


What you add with small closed chamber and a increase in compression, the smaller valves and port flow will make it all go backwards. Keep the #302's for the 273/318's.


I would use a set of old 67 273/318 920 heads... They are closed chamber... And not prone to cracks...

I had my head guy do up a set for one of my 318's that I'm building and he ported them and installed 360 valves in them that I had left over from converting 360 heads to 2.02" intakes... Install the 1.88" intake valves, 1.60" exhaust valves (with hardened seats) in the 920 heads and give them a good port job and they will flow as much as a stock 360 1.88" head or better...
 
In my experience, only if mercilessly overheated. I hear cracks between thinnest parts between the valve seats are a common place for cracks. As far as heads go, I would wait for the Black Friday sale from speedmaster. Do you really need aluminum heads for a cruiser? No, not really. But compare the cost of getting a set refreshed at the machine shop vs a pair for 40% or 45% off, and aluminum starts looking very attractive
 
I want to put together an a body to leave North at our Summer Place in Wyoming. It will be used in the Foothills and the Rockies themselves. If I build a motor for good low-end and mid-range would would a 318 do the job or would it be worth moving up to a 360 and putting up with less mileage
360
 
How does posi traction work in a Plymouth????

It just does....


:poke:

upload_2021-10-2_9-15-29.png
 
-
Back
Top