Here's what I have for LA head spec's up to '86 or so, I'd appreciate it if someone could fill in up to the end of the pre-Magnum engines.
LA Small Block Cylinder Head Casting Numbers and Spec's
Through 1986 (From How to Rebuild Your Small-Block MOPAR
by Dob Taylor & Larry Hofer HPBooks 1987):
Engine ---- Year ------ Casting - Intake/Exhaust - CC
====================================
273 -------- 64-65 --- 2465315 - 1.78"/1.50" - 57
273 -------- 66 ------- 2536178 - 1.78"/1.50" - 57
273/318 -- 67 ------- 2658920 - 1.78"/1.50" - 57
273/318 -- 68-74 --- 2843675 - 1.78"/1.50" - 60 '69 last year for 273
318 -------- 75-83 --- 3769973 - 1.78"/1.50" - 63
318 -------- 77-86 --- 4027163 - 1.78"/1.50" - 63
318 -------- 77-84 --- 4027593 - 1.78"/1.50" - 63
318 FstBrn 85-86 --- 4323302 - 1.78"/1.50" - 62.6
318 Police 83-86 --- 4323345 - 1.88"/1.60" - 75.1
340 -------- 68-71 --- 2531894 - 2.02"/1.60" - 63
340 TA ---- 70 ------- 3418915 - 2.02"/1.60" - 65
340 -------- 72 ------- 3418915 - 1.88"/1.60" - 65
340 -------- 73 ------- 3671587 - 1.88"/1.60" - 65
360 -------- 71-72 --- 3418915 - 1.88"/1.60" - 65
360 -------- 73-74 --- 3671587 - 1.88"/1.60" - 65
360 -------- 75-76 --- 3769974 - 1.88"/1.60" - 65
360 -------- 76 ------- 3671587 - 1.88"/1.60" - 65
360 -------- 77-86 --- 4027596 - 1.88"/1.60" - 65
360 -------- 77-86 --- 4021051 - 1.88"/1.60" - 65
Note: of the unmolested heads that I've had CC'd they came in between 2 and 5 cc over spec, except for one set of ...302s which were 0.5cc under spec before chamber work and milling.