I have what I believe is 1966 273 commando engine, tried running number on block it comes up 273 or 318. Block number is 2806030-1 number on the heads is 2658920-2. Thanks
the CID will be cast into the side of the LA block, 318 next to the casting number, 273 wont have this. The heads numbers could cross to a 318 as they were pretty much the same.