Here is how I filled out my application form IVA 1C amd IVA 4 when applying for my IVA. This was for a 1.6 MX5 based build.
Sent this along with
- PHOTOS OF BUILD STAGES - About 20 making sure there are photos of your seat belt/harness mounts fully welded in.
- COPY INVOICES FOR MAJOR PARTS - I sent most of the invoices I had.
- ENGINE ORIGIN LETTER - Got this from Mazda to prove the age of the engine. May not need this as the IVA guys said the donor V5 would do. Worth checking with your IVA station.
- COPY OF DONOR V5C