when put new rings in the keith black duel plug mag covers they actually are real thin and go inside the tube hole wall
when tried to put tube in was no way it was happing
took some oil and rubed the tubes good ,made a lap around the o ring
gave the tube a twisting push and glided right in
maybe it can help

1970 barracuda convert. 1 of 59
1970 pro street A.A.R. clone (panther pink)
1971 charger
2015 hellcat challenger. Redline red
2014 quad cab 4x4 ram 8 speed hemi