@80’s old school
I just installed BDStone914’s heater block off plates.
For us that have headers and no heat, what to do with the big round holes through the engine tin?
Bruce solves it. Nice cut, painted, exact fit with hardware.

Way to go Bruce!!
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Thank you. BTW you have the wrong grommet for the alternator harness. Note the big gap. I think 914 Rubber sells them. Or cut a short section of hose to fill the gap.