Vintage air problem versus computer

[RdHuggr68]

Have a 72 Chevy with Vintage Air GenIV system.The car has an LS motor and the fan only kicks on at 220 degrees. The problem is that when you turn the air on the fan does not come on unless the motor reaches 220. Well that raises all hell with the compressor because the condenser is not getting any air through it.
Without adding another fan for A/C only does anyone know how I can get the existing fan to come on when the A/C is turned on without screwing up the computer?

Thanks , Kevin