[DeadheadNM]

If I'm reading the parts manual correctly, there are three examples each w a different part numbers for 71-72 small blocks: 3919807 left front, 3917664 right rear, and 3817657 left rear and right front. I'll edit this post later w photos that illustrate each.

I've not been able to locate a p/n for the heat stove. Definitely, the CA emission trucks used the two-hole version. It seem though that there are more two-hole versions floating around fwiw. I suspect the two-hole design was also used on at least some non-CA emission motors. I'll look through my base line photos of the 350 that's now in my K20 to see what it had. This engine came totally complete from a running survivor K20 Suburban w ~50k miles on it. Also, I'm wondering how well the repro vette pieces will fit since I believe these are designed for 2.5" outputs rather than the 2" for K trucks.

EDIT: Engine photos here. Not best angle but stove appears to lack the holes http://67-72chevytrucks.com/vboard/s...7&postcount=20

Mine are off in winter storage. I need a separate garage.

Plug wire routing is a great topic that I need to know more about. I'm thinking there may be existing threads on the specific topic we can dig up and bring to life.