Have us print this for you
PLA from £6 inc. UK delivery on letter-sized prints. We slice, print on a calibrated Creality K2 / Bambu A1, QC and post.
Here is a block off plate for your basic Small Block Chevy, 305 to 350. You'll need to print two, File has just one. They are identical from side to side.
Be advised, you'll see 2 of each number as there is 3MF files and STL files.
Recommend Print settings:
4 Walls
8 to 12% Infill
PLA if it wont be outside in the sun, PETG if it will see lots of sunlight.
These do not need to be tightened down tight, they are just a cover to keep dust out.
