66 barracuda

Hi, I just acquired a a 1966 Barracuda with a 318 automatic, floor shift. I am in need of a tailshaft housing for the transmission, the mounting tabs for the floor shifter are damaged. I got the original engine with the purchase but it is out of the car and questionable at best. there is a 318 engine in the car that has the following casting numbers 5M318 08080731. can anyone decode year of this engine and tell me if the original valve pans and intake will fit on it. I don't care if my car isn't original, but I would like to make it look original if I can. What I have now is a bunch of plugged vacuum lines hanging out all over the place.

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