They won't bolt right up. I used to have 2003 mach 1 take off's on my 2002 v6. What you have to do it cut the y pipe when they start bending, have 2 pipes bent about 2 feet long that will go from where you cut to the new takeoff's.
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"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
on my 98 i have a set of take offs from a 04 Mach 1 (well the tips and some of the pipe, i run Dyno max mufflers) and the shop made a H pipe, cut, weld all up.