350 motor numbers, I have questions

[Steven R]

I have a 350 motor in my 71 GMC 3/4 ton longhorn, It says Invader 350 on the driver side valve cover and on the Passenger side just in front of the valve cover it has a stamped K06 11 TBC I am hoping it will be a 1971 350 motor.

This is a canadian built truck and sold in Canada which from what I can figure matches up to a Canadian built 350. I could be wrong.

I cant get any more numbers right now. I cant see any and this is a very dirty engine.

I need to figure this out soon as I am planning on getting a heat shield and plug wire keeper set soon. The new plug wire set the shop put on are too short and the parts store want me to buy a 300$ set of wire and he can't tell me that they will be the right ones. only that they will have a straight boot not a 90 deg boot.

pls help