The sun was out today. And even though the outdoor air temp didn't get above 31F, it was 36F in my garage at 3pm; so I put in a couple hours until it dropped after 5pm.
I did get the #7 tube fitted to the flange and routed to the collector. But not tack welded. A little progress anyway....

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1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1