340 heads

Locomotion said

As far as small blocks are concerned, this appears to be a fairly accurate listing. I believe around 1970 340's were 915 w/2.02's.
The 308 head was used from the late '80's till the last 360 LA around '92? Don't know what was used through the rest of the '80's.

Small Block Mopar Cylinder Head Casting Numbers | Hot Rod Reference

Earlier heads had the casting numbers under the valve cover. At some point, later heads had them visible from the chamber side of the head.

Click to expand...

Yes, this is what I go with also when bench racing.´70-72 J-heads (915) in different configurations.
Now, there are only six different SB-head casting number from ´64 till late sixties, (1.78X1.50" and 2.02X1.60 valves) when MOPAROFFCIAL noticed this X-heads (witch I absolutely believe is a correct description), and which one would be an X-head other than the 894?
I´m sure there are guys here who know their early SB-heads and #:s and can step forward.
What I´m trying to get at is, there but one X-head casting... the 894.
Anything else is yet another example of, how Ma-Mopar quickly solved a problem that showed up on the assembly line...