I'm doing an LS swap into a 64 Chevy II... picked up an LQ4 and some L92 heads. My intake has a stamping #1259012... I'm not sure what the intake came off of (I was told a 2014 SS I believe)... the stupid question is, which intake seals do I use? I figured I'd go fel-pro, but there are several different part #'s for different applications... can anyone shed some light here.

 

There aren't any stamped numbers on LS intakes , there are cast number into the mold. Your part number you listed is incomplete GM has 8 digit part. #s . The part you have may be 12590124 if this is the case ? Then it's a L76 intake . Hope this helps !

 

If it helps, your heads and intake manifold should all work together nicely!