Looking at buying a 69 Camaro SS but the engine suffix code is throwing me off. Can anyone tell if this code is legit, the J in JH looks a bit weird to me. Date lines up with the rest of the car and seller says it’s the original engine 396 375 with original heads and intake. I can’t make out the partial vin on the back of the engine but it’s there, some numbers I am able to make out and they match the vin. Thoughts? Thanks in advance