Good news (I suppose!) from members that there wasn't an easier way to get the body off. I wanted it to keep its shape so still had doors and windows, and along with dash ,petrol tank etc was actually quite heavy.
Sean at Spydercars (about 40mins from me) was really helpful with advice on what chassis to use when thinking of an engine conversion. Saw their S2 and Twincam bare frames and twincam rear 'Y' section was splayed out more, presumably because the Twincam block is chunkier than the Renault?
However I wasn't convinced by the Spyder rear upper wishbones - very short, so camber changes?
Talked to Richard at Banks Europa as I liked the look of their frame, using a 4 trailing arm setup, like the Type 47 maybe.
Anyway he said he didn't make them anymore, so a bit of a dead end. Had a quick look at the Banks Europa 'Marketplace' on their website, and there actually was a used Spyder chassis for sale. Rang up, knowing a new one was nearly £4k ...seller said he wanted 200 (200 what I thought!)
Amazingly it was £ and it was hardly used - turning his Twincam into a historic racer he couldn't use the Spyder chassis so wanted it gone!!
Having this meant I could repair and paint my old chassis (which actually wasn't very rusty but had quite a few cracks) and sell a whole S2 'kit',
Chassis, trailing arms, rear wishbones, driveshafts, uprights, engine, gearbox.
Here are a few pics (of the old chassis and the new one I viewed at Spydercars), which I now can resize to 800x 600 pixels, hoping that this at last gets them to a viewable size (I use a Macbook)