As far as i can work out that inlet is part of the V50 pack, found on the 505 and the 550 600 and the 460 something or rather late model utility.
Anything thats got a tank thats not mounted on the cover.
Im not sure if the block/ports were different some how. Perhaps combustion chamber in the head. Perhaps the muffler. The inlet and the large tube up to the throttle.
I can check the head out, might find a different one here. I got a utility here thats got that manifold, some farmer had a fiddle with it and trashed it.
Ive also got a head with a not machined out off decomp hole, not sure what thats off.
Not sure about that one in the pic above with the small tube.
I also had a late model alloy corvette (400 i think) that had the large tube on it.
What did the v45 consist of?
Bob.
