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I did some research prior to building mine (I've built a road car version), wheels & tyres are the hardest parts to find or replicate.
From memory I thought HDT used 16x10 Momo AP racing rims on the VK Group C day-glow cars & painted them white, I couldn't find anything similar at the time in Australia so elected to use 15 inch Weld ProStar 15x10 rear & 15x8 front (imported from the US, multiple copies available as well), tyres are the next headache as 15 inch tyres sizes are limited compared with the early 80's. I ended up using 265/50 rear & 225/60 front but could have gone with 295/50 on the rear. A mate of mine built a replica VK 05 race car and got set a of used 15" slicks off a "muscle car".
Some have had rims specially made in the $1,500 - 2,000 each range ($6-8k), that way you can specify the backspace & diameter.
Rear prior to powder coating:
View attachment 200676
Front powder-coated & decals:
View attachment 200677
Mine finished:
View attachment 200681
Actual 05 race car:
View attachment 200680
That makes more sense, getting the rear bumper to "cut" into & around the rear flare was a real mission. I wanted to keep the flare & bumper both bolt on rather than using a urethane style sealant to adhere & fill any small gaps. So I needed to have a small gap to allow the bumper & flare to move independently of each other without rubbing the paint off. If you were to glue, paint then wrap the car in "Marlboro" decals it would hide a multitude of imperfections.
Hopefully lacksballs read this, stunning car mate, may l ask who you git your wheels through in the USA cheers urkss