erm not really sure tbh, car got rather more expensive to insure but the enigne wasn't the only thing i changed didn't have any issue getting quotes for car with the seat motor but what a lot of insurance compnies din't liek was the lack of interior.
my insurance is £860 fully comp agreed value of 3K limuted miles to 3000.
nfu quoted me £1200 fully come agreed value 3k unlimuted miles. 1200 was exactly 50% more than a std golf syncro and they said the poicy was running a 50% load to account for the modifcations compared to a standard one.
but as well as the engine, the car has 280mm brakes frount, cabel change gearbox. difrent arbs. the part none of the compnies like was ALL soundproofing removed, carpets removed , rear seats and seatbelts removed.