Howdy Slingshot, welcome to the forum. Seems you're just up the road from me, we have a good group of guys in the North West if you fancy a rideout anytime.
Hi and Welcome, Slingshot!! Now stop teasing us and tell us more about your work, and also show us some pics of your bike(s), or even some of the race bikes, we won't mind!!!!! In other words...
Late 80's/early 90's and they did the slab side which was similar but the tank and frame slanted, not as nice IMO