I have a 1978 c10 vintage class 8. It currently has king 3.0 triple bypass I believe 14”. Modified A arms and coils I think 1300 pound springs. Rear is sprung over Nationals with two 2.5 Remote reservoir per corner. Rules state 2.5 is the biggest shock I can run. Will a single 2.5 be enough? I was also told a bypass is pointless with 12” to 15” of wheel travel. Is that true?