Accessory Belt length

as long as you have the proper "stock" pulleys and brackets this should fit:

GATES 7470 {Click Info Button for Alternate/OEM Part Numbers} High Capacity V-Belt (Standard); 13/32" x 47-5/8" Info
Fan and Alternator; w/o Air Conditioning

1970 DODGE DART 5.6L 340cid V8 Belt | RockAuto