if you're doing it for insurance purposes and you're really that worried, you may want to consider the big 1.6 in the front of the block, and also the 1.6 stamped on the head.....slight giveaways!

Yes the dizzy off your car will work, but as said previously you'd be better off getting an engine that was already on a carb, a conversion plate will cost you £70 plus for the head, i could get a whole engine from the local scrappy for that!