You might get away with a few spot welds around the tubes with slapper bars but if you go to ladder bars or a 4 link they need to be welded all the way around. Been through that whole deal before. Just keep a close eye on the tubes. Put a mark on the housing and one on the tubes and check it regularly.
440:
1/8th mile 6.56 @ 104
1/4 mile 10.43 @ 127
400:
1/8 mile 6.86 @ 99
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455:
1/8th mile 6.52 @ 104
1/4 mile 10.43 @ 128
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