Its confusing me, and i've been through the process.
This what I did to get a 'H' Suffix plate on my Cobra rep.
Built kit using granada donor (J reg) with V5
Used a 4.0l RV8, Letter from heritage centre, gaydon to confirm age of engine,
put it through SVA got MAC cert.
went to DVLA with V5, Mac Cert, all receipts for the build. completed their paperwork (build up form, and application for registration, tax etc)
Nice man from DVLA inspected car, for chassis no., engine no, and the donor parts.
in reality he just wanted to see the chassis number stamped on the chassis and look through the receipts.
Was then given a 'J' prefix registration to put on car.
I then bought a 'H' suffix plate at DVLA auction, which included all fees.
Went to DVLA gave them my entitlement to registration form and they gave me a new tax disc, and a piece of paper to get the plates made up.
Probably still as clear as mud
BTW the DVLA are clamping down on the donor engine change trick, and may ask to inspect the donor to see the engine in it.
