340 mismatched heads?
Interesting discussion on the Mopar 340 heads. I finally started to give my Challenger A66 engine some love after sitting and not started for over 20 years. Both of my heads are 915 heads. Driver's side head; dated 12/03/69 and is an O head. The passenger side; dated 2/11/70 and is a U head. Engine is Windsor built 340 with a date of February 26, 1970.
I had hardened seats and bronze guides installed in 1980 when the car was my daily driver.
Actually thinking of going with Edelbrock aluminum heads?
View attachment 1715745234
Interesting discussion on the Mopar 340 heads. I finally started to give my Challenger A66 engine some love after sitting and not started for over 20 years. Both of my heads are 915 heads. Driver's side head; dated 12/03/69 and is an O head. The passenger side; dated 2/11/70 and is a U head. Engine is Windsor built 340 with a date of February 26, 1970.
I had hardened seats and bronze guides installed in 1980 when the car was my daily driver.
Actually thinking of going with Edelbrock aluminum heads?
View attachment 1715745234
