Join Date: Nov 1999
Location: Central California, USA
I haven't done one, but I'd think there are two ways to plumb one.
Since no one else has answered this, I'll throw some ideas out. Just realize I haven't tried it.
1. T the suction line into the existing line, add a check valve between engine and T to prevent the pump from drawing air from the engine side, use a check valve like the one on the booster pointing the same direction, towards the T.
2. instert the pump inline with the booster, this way all vaccum for the booster runs through the pump. If the pump is small it may restrict flow too much to work well this way, but the amount of "head" the pump sees is much lower this way, the pump would have less work to do.
Probably #1 is the most common way I'd guess.
Check my web page for First Gen Camaro suspension info:
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67 RS 327 original owner. 1965 Lola T-70