LA head casting ID help.

Jadaharabi said
View attachment 1715258396
For your viewing pleasure.

Thanks Jadaharabi
So if i am reading this correctly i have 360 heads not 340 heads judging by your photo and
If the following is correct then 340 heads would be stamped 340 and on a 340 and 360 heads would be stamped 360 and be on a 360?
"3418915 – 1970-1972, 360 LA-series small-block, 1.88/1.60 valves, 65cc-73cc"
"3418915 – 1971-1972, 340 LA-series small-block, 1.88/1.60 valves"
Now being I am new to this head ID thing my next question would be does it matter if I have 360 heads on a 340?
Its more or less stock.
happy Mopar :)
Thanks in advance,
Arron