Thanks Russell! Looking forward to seeing your 2nd edition get finished.
Great job mate! How far (or close) is it from an original M8 in shape/size? I am not familiar with the Manta...
External dimensions wise, it is very close, sans the additional two inches at the rear of body behind the rear wheels to cover the rear of the transaxle. Proportionally, it is very close on the panel sizes. Shape-wise, I utilized more double curves on the front where the McLaren was pretty simple with mostly single curve surfaces. I used a detailed mechanical drawing of the McLaren, and then scaled it up (1mm=1.73"), and went from there on every major dimension that I could. In a couple of areas I was unable to match it perfectly (so practicality won out), but overall it is very close to the external dimensions.
Less than 10% of the Manta still exists in this car's body and structure/chassis. This car's nose is 5" shorter and 4" wider, and the Manta had a hard-top. In my opinion, the Manta more represented the Lola T163 than anything else. I'm not sure how the McLaren link was formed when folks make reference to the Manta.
The front and rear panel profile curves were considerably softened to match the McLaren. The rear panels and doors were scratch-built, and the nose panel only utilizes the first 5" or so of the original Manta nose. I also took measurements of a McLaren at Can Am cars in St. Louis for the details not provided in the attached diagram. I chose to keep the tubed box immediately surrounding the seat tub. Everything beyond that box was fabricated outward to ensure the McLaren suspension configuration was used in this car. Obviously I didn't monocoque the chassis as others have, but that was a challenge I chose to avoid due to may lack of knowledge and confidence in making a robust and safe monocoque chassis for a street car. All the "street" considerations made the car considerably heavier than the McLaren (and even the Manta), but I'm very confident nothing will fail unexpectedly due to insufficient design. Until one can see a Manta and then look at a McLaren, it harder to see all the huge differences in the two, and focus on the similarities, which is the front or nose of the car, and lower side pod covers.
Now I actually have an "orange car".