Chassis and running-gear restoration for both vehicles has been undertaken by Andrews' own workshops in Frankton.
After four years of work, the public will get an opportunity to view progress on Wednesday October 2 inside the Classics Museum in Hamilton in the second part of a two-part charity programme.
In the first, four-time Bathurst winner and Kiwi racing legend Greg Murphy will speak about his career, fielding questions, and mix with the audience.
The tickets are $50 per person, which includes canapes and first drink, and can be purchased through Eventbrite.
All proceeds will go to the Cancer Society.
Seating is limited. Inquiries — Vinod Bhikha 0274 761 245.