Welding exhaust tricks.

Hopefully I will get some time this weekend to fit and hang my exhaust.

I have a small wire feed lincoln welder with no gas, just flux core wire.

Should I attempt to fully weld my exhaust with it or just tack it and take it to the tig man?

I have had some pretty good luck as an amateur welding but I'm not a pro by any means but I have steady hands and can run a pretty nice bead considering.

If it's something I should attempt any pointers would be helpful, thanks.