OK I may have failed to explain the situation fully or maybe I don't understand it.
The fact is that the vehicle is already registered - I have the V5 in my name, it is currently declared SORN and is in bits, scattered around my yard and workshop. I am under the impression that it is for me to decide once I have reassembled it, whether it complies with all regs, points systems etc. and if I decide it does I need not tell them anything other than fill in the appropriate section of the V5 to declare an engine change and then to submit a MOT exemption declaration when I tax it.
This system is obviously open to abuse and DVLA must be aware of that. I believe they carry out random inspections and there is always a good chance of attracting attention from DVSA while out and about. So not submitting it for a SVA if I believe it needs one (I don't, 11 points out of 8 required - looks good to me), or making any declaration that I know to be false, would be an extremely stupid thing to do.
Now as most RRC & discos have bad sills why not shorten the body to a cab & flat bed it?
Brilliant idea, was already considering it but didn't want to further complicate this discussion by mentioning it, I reckon a 130 Hicap body might fit the wheelbase.
to Most people on here you are trying to do the same as putting a S3 body on a coils.
Yes I'm aware of that and I have some sympathy for that point of view, I think that what I'm proposing is technically and legally different. Whether the rules that might permit it are good, well written ones is certainly debatable but if they do indeed permit it then I'm just the type if obstinate old bugger to actually do it.
I did see a tax/mot exempt disco on a RRC chassis/ID on ebay last week, whether it had been done properly or whether it was just a plate swap, i don't know, I couldn't tell from the pics and it was too far to go see, starting at 3.5K it got no bids, it was a rough looking thing.