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I saw your 22R engine 2 years ago and have been saving since for a 3d printer ever since to print it. I finally got the printer last month (Original Prusa MK3S). I own two Toyota pickups, 1990,1991, one with a 22R and the other with a 22RE. I have rebuilt both engines, upgraded one with a weber, the other to a twin row timing chain so I know these inside and out.

Do you have the upgraded head file(s) and parts to upgrade to the LED spark plugs as seen in the video feature you here? https://youtu.be/bhZv04JzE9I?t=135

I've ordered candy apple red filament to match my real life valve cover and did a 50% reduced test print last night. I have attached a pic.