You could use the bracket from a mid 60's car or truck. They mount on the front of the left exhaust manifold and have an adjustment arm that pivots on the water pump or intake manifold. Of course you have to have the correct exhaust manifold to go with it.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine