This reply is too "Lugnutz" ---
Jay , would you still be looking at / for the 250ci - 6 A/C brackets ?
The reason for me asking IS :
I drive a 69 Chevy Nova with a Factory 250ci engine (original matching motor) ; My Nova does have factory A/C still installed on the engine (complete & intact) - - - I'm replacing / up-grading my A/C hoses at this time.
This car came with the factory HD Cooling : using a V-8 3 row radiator , a V-8 7 blade clutch type fan blade , a 'thermo' type FAN CLUTCH , ----- and ----- has the factory 250 - 6 stock A/C "short water pump" .
The "Short A/C Water Pump" = = is the same as the standard Chevy water pump - - - but, HAS A Short Pump Shaft installed.
That A/C water pump --- will most likely not make any difference for your truck - - being , you may have more clearance towards your radiator . . . (the Nova needs the extra clearance , in front of the engine) .
What all this means is : I can take any pictures of any items you may need "reference too" . I'm using the stock 250 - dist. with the ' Pertronix ' up-grade.
later , jim