22506300RH 380001LH A little crusty. All threads are good. $40 plus shipping for the pair or local pickup, Cleveland, Oh. area.

 

Do you know what they came off from? The right is an '80s and left is from the '70s.... I think

 

No, I don’t. I am guessing an Olds 350. Came with a TH350 I bought locally.
Ron

 

Ttt

 

380001LH actually goes all the way back to 1964, however the 64-68 manifolds used a heat riser valve. The valve was deleted starting with the 1969 model year, so this is 1969-72.
22506300RH is all 81-85 SBO and 86-87 VIN Y 307s. Note that the O2 sensor boss is not machined, so this is probably an early pre-CCC unit or Canadian.