What could I do with this Thermoquad?
‘78 is a tough year to decipher. Pictures of the vacuum tubes?
Less the better. EGR port? Purge? Charcoal canister port? In the primaries, the front wall, are there a port in each leading to the outside air?
It’s possible to get it to work but the earlier ones are better and easier.
Any of these top 4 you stumble across or non emission TQ from a car or truck is what you want. The less vacuum hook ups the better. Up front, 3 vacuum tubes at most. On the back, there is one for the secondary pull and at the max, 1 more for straigh full time vacuum. No main bowl EGR port. The port on the top is a vent tube port and that’s OK to have. You also want the fuel inlet to be on an angle, not straight up and down.
4846S | Competition Series | 331 | 341 | 615 | 1-1/2 | 8 |
4846SA | Competition Series | 3080 | 3116 | 615 | 1-1/2 | 8 |
4847S | Competition Series | 331 | 341 | 616 | 1-1/2 | 8 |
4847SA | Competition Series | 3089 | 3116 | 616 | 1-1/2 | 8 |
4972 | 71 340 MT (3512820) | 3074 | 3125 | 655 | 1-3/ | |