Seam sealer could solve the gap issue.
I can't believe you have "used parts" parts going on this project
Are asking about sway away torsion bars? I dont think they make leaves for the front beam.
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG