Love these AMT 40 kits. This drag car '40 is coming along nicely! Check tire clearance on the rear before painting the body. I had an issue on a Plymouth after painting, not fun.
Got a set of 3D printed master cylinders and boosters from Ebay and was very disappointed. They are nice prints but way undersized. They are listed for 1/24 and 1/25 but look closer to 1/32. This is an FYI if you see them and consider purchasing them. I messaged the seller to inform them of my thoughts, maybe they will resolve the issue.
Here is a booster and single master cylinder next to a Revell 66 Mustang master cylinder for comparison.
Any good sources out there for these kind of parts?