GT40 Gulf-Wyer style turnkey...with authenticity in appearence and detail being primary considerations
Just a thought,
ERA sells the Gulf-style flares as a stand-alone option, I believe. That is, you could just buy the flares from them, and then adapt them to your SPF car. This is presuming that the wait time for an ERA is still 2+ years as it was last time I looked.
Of course, you are still stuck on the wheels/tires front, since SPF wheels will no longer fit correctly in the rear. Perhaps ERA can source you appropriate wheels as well?
They have been in business longer than anybody else.
I had been leaning towards the ERA initially and had heard quite a few good things about them. Then I saw the SPF. The chassis and suspension certainly appear more closely like the original. The SPF is available with a Gulf Wyer paint scheme but the ERA's rear flares are larger and more like the original. I don't like the fact that ERA seems to source out Corvette parts like brakes and CV joints. I'd expect something more from a car costing this much and seems to cheapen it. Just my observations so far.....