I can feel the excitement from here Ryder, great to see another Harrison on the way.
Assuming you've purchased the Vintage Wheel Works wheels recently advertised here, if they're NQR it won't be spacers you need - the opposite. They're too wide and you don't want to machine them down - apparently not safe.
On my car the body is aligned OK at the rear but off centre about 15mm at the front, plus those wheels with -1 deg camber are still too wide, even if the body was centred properly. I'm using the opportunity to flare the guards and correct a few issues with the front guards, may even reshape the mudguards at the rear.
You should be able to dial up enough height at the front with coilovers and 400lb springs - enough to be able to drive it with those wheels anyway.
Keep the updates coming!