365, 367, 388, 389, and 567 - 14,600 and 20,000LB Axles - Set Forward
14,600 and 20,000LB axles only - set forward axle position (25 inch X 34 inch spring length)
Springs in the same OEM number series are the same except for the bushing
14,600 axle springs use a 1.75 inch diameter eye - 20,000 axle springs use a 2.08 inch diameter eye
RB-295: 7 1/2 inch long
RB-328: 6 11/16 inch long
RB-308: 7 1/2 inch long
RB-324: 6 11/16 inch long
For increased durability - Conversion to threaded bushings and pins is an option
With TB-77, Use 327-540 in place of RB-295 and 327-544 in place of RB-328
With TB-81, Use 327-540 in place of RB-308 and 327-544 in place of RB-324