I'm installing a tach/gauge dash into my sweep dash elky. I have the original tach/gauge wiring harness with the new dash. The A/C harness with the tach/gauge dash is a bit beat-up and a couple of the vacuum hoses are cut. Can I just use my original Sweep Dash A/C harness and vacuum hoses?

sMiTtY

which year?

1971

Yes the A/C harness and vacuum hoses are the same.

Aren't they the same for 70's and 72's as well?

Aren't they the same for 70's and 72's as well?
Nope 70 and early 71 vacuum harness has two vacuum lines going out of the firewall. The solid black one goes to the vacuum reservoir and then the engine intake port. The black one with a white stripe goes to a heater hose block off valve. On late 71 and 72 there is only 1 solid black vacuum line coming out of the firewall to a check valve and on to the intake port. if you mean a 70 malibu a/c harness to a 70 ss a/c harness. Then yes and likewise for 72.

Yes, that is what I meant. There is no difference in the AC wiring between Malibu and SS for the years 1970-1972, but there are differences betwen the individual years.

Ok.