I called Waldrons for info about my '57 LCF, they couldn't offer anything. I bought elbows and mufflers from Summit Racing, bought straight pipe locally, measure cut, test fit, weld. Less than $300 for dual system from manifolds back, positioned the mufflers under the grain box and turned out the tail pipes out from under the frame rails.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy