Since no one has posted up the process ... I'll post installing Speedtech Inner wheel houses for their extreme subframe. This is how I did it, which is not the only way to install the fiberglass tubs but this is how I did it.... couple calls to Vince to assist was helpful, thanks Vince!
Well, the Glasstek tubs are close they do need some attention, specifically, the radius to match the OEM wheel arch is not the best, in fact,
the whole mold is too wide as compared to the OEM wheel arch. No biggy, I drew the arch on the fiberglass and sanded it down to more resemble the OEM arch.
I did grind off the OEM steel wheel lip by 3/16 and hammer and dolly the radius to vertical.
As well as to hammer and dolly the upper mounts to the more horizontal plane to match the Glasstek tubs.
The Glasstek was a good mold for references such as the front drop off panel and the radiator support with dimples in the fiberglass that could be drilled out with confidence.
The only real difficulty was the tub to fender attachment, while the inner had the clearance it still needed to mate up the top brace like the OEM, I even used the OEM fender washers.
Once fitted to the fender I fit the tub to the car and marked the location for the top bolts to the fender brace.
You do need to cut off the OEM fender brace coming off the firewall to allow clearance for the tub.
And my brake lines have to be redone because of the tub that came too close to the MC.
I bent the existing brake lines to exit the right side and enter the right side of the MC .... not sure I like them but for now, they'll do.
Of course, I repaired the OEM fenders with patches from Classic with the brace.
And then I mounted the entire front end ...
Thanks for looking ...