question about 360 heads

70Swinger said

hey, i know someone who is selling a pari for 74-75 360 heads. could they be X, J, or O heads?

Thnx Adam

Click to expand...

No, they wouldn't be, not originally, anyway.
'X' heads were used from '68 through early 1970, but some were used in later '71 when Chrysler knew they'd probably be phasing out the 2.02 intake valve and wanted to clear backstock from the shelves.
The 'J' heads were used '70 through '72 and had either 2.02 or 1.88 intake valves.
The 1.88 valved 'J' heads were used on '71-'72 360 and '72 340s.

The 'O' heads, like the 'Z' and 'U' head were used in the latter part of the 1970 Model year and were USUALLY 340 2.02 valved heads, but a few made it onto the itroduction of the 360 in the late 1970 model year, in the form of 1.88 valved castings.

Yes, there is an application that used a 360 in 1970!!

Mark.