Thanks for the link. But this brings on quite a few questions:

First, a bit of background on the car and what I intend to do. I'm purchasing a 4-cylinder Mustang coupe. Based on some of the modifications that I want to do motor and suspension wise, I am setting it up to most likely compete in SM.

Now the questions:

1. The 99-up Cobra IRS bolts up to the factory supension locations. I know this is an entirely different rear suspension setup than the stock 4-link. If I were to eventually compete on a national level where people actually care about what you have done to the car...will this still be legal in SM?

2. I heard tubular k-members (regardless of whether or not they retained stock suspension geometry) were not allowed in SM. However I have yet to read this in any rule book. True or false?

3. If I have to use the stock k-member, what about tubular a-arms? Are bolt-in braces that strengthen the stock k-member allowed? Do I have unlimited choice of bushing materials?

4. The interior: do I have to retain any of the factory interior? I plan on just keeping the dash and headliner...door panels will be replaced with aluminum sheet and everything else will be sold.


Thats about it. Everything else is pretty clear. However I do find having to retain a metal trunk lid is strange. Finding a rust free perfect condition trunk lid without holes for luggage rack or spoiler can be almost as costly as purchasing a fiberglass unit. Just find this a relatively odd rule.