Seat Platform/Riser Modification

[md02geist]

Hey all,

So since it looks like I'll be redoing my floorpans anyways, I figured I might modify the seat platforms/risers/whatever you wanna call them.

Any major issues with dropping them about an inch, and perhaps moving them back 1-2 inches?

A guy today told me that it would cause my carpet (getting new carpet, replacing the old stuff that got moldy and nasty when my seals leaked) to not fit since the carpet is molded?

[awhtx]

I did exactly what you're talking about doing and I haven't installed the carpet yet but the guy who's helping me said a heat gun will re-mold the carpet..

[88cougargt]

I lowered mine by about 1.25". The carpet is a little more of a PITA to install, but I think it looks fine. Once I have mats in, you'd never know it was there.

The fit around the tunnel is the tightest. This is because there is less material to get down to the lowered pan.

My only advice is to make sure you don't lower it so much that the Passenger seat hits the tunnel. My passenger side only slides about 70% now. I think mine are too low and I'll probably be adding .25-.5" spacers to bring them back up a bit. I'd do it again, but only lower it an inch or less.

Here are some pictures:
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[wareagle]

along the same topic, what is the trick for positioning the new seat risers on a new floor pan.

[DrStang]

I did the mod recently. Be care when you cut down, that you don't cut beyond the reinforcement bracket underneath.

There are a few articles on the web. The Mustangs plus one is ok, but there is a better one out there that has you re-weld the cut off flanges, instead of making your own.

Also, I believe that '69 pans are already shorter, so you may want to use those.

I had no problem with carpet fitment

[88cougargt]

Agreed, use 69 pans. As far as locating them, it's pretty obvious but I made measurements before cutting out the old ones.

On the floor, there are two "strips" ruining side to side on the floor pan. These are where your flanges attach.

[wantaboss]

On 1970 there's a slit on the inside of the rocker then there is a u shaped notch on the seat riser , with that and the measurements you took before you cut them out lol the slit will be lined up with the u shaped notch

[manley]

To add to what the others said, use 69 fastback risers.... the coupe risers are taller.

[md02geist]

Have you guys been taking 69 seat risers and putting them in the same spot as the original 66 risers were?

[1-18-68]

I dropped my pans a bit more than 1.5" and moved them back about 2". I also extended the subframe underneath with an extension welded on just to make sure I didn't lose any structural integrity. I was not concerned about seat fit because I have racing style seats being used which would have been an issue as others have mentioned. I also installed a tilt steering column to help fit my carcass into the car. Height is the issue at 6'4".
Fitting carpet is easy with a heat gun and patience.
Russ

[65fstbpieces]

I am putting a 69 seat riser in my 65. I have extended the seat tracks on my Procar Rallye seats which helped a lot. I am putting the lowered pans in when the new floor goes in. I am concerned with how tight every thing might be.

[chillininnh]

I wanted my risers back 3-4 inches and lowered, ended up welding the studs right through the bottom of the pan. It should be noted that I'm using aftermarket seat adapters. The back of my seat practically touches the rear seat arm rest. This is what it took for me to be real comfy in the car for long trips.