The check valve on mine is mounted on the firewall in the engine compartment higher then the carbuerator. 1/2" steel lines run down to the hydrovac under the driver side floor, mine has no vacuum reservoir. It was working a little but leaking brake fluid so for now I have it bypassed.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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