Jeff - I am helping a buddy redo his crossover for his 1977 Altec Model 19 speaker.
4 caps in the tweeter section: 4uF, 6uF, 8uF, and 16uF
1 cap in the woofer section: 21uF
Will use Alpha inductors and Mills resistors for the rest of the crossover.
Budget for the caps is $200 (for 2 crossovers) give or take.