Looks like I'm going to have to get the Retrosound. I assume you have the slimline version?
https://www.retromanufacturing.com/p...pontiac~md_gto
Unfortunately...I got mine last April, but things got delayed with COVID et al. Doubt they will take it back now...out $185. They should though, as it's advertised to fit my 70 with AC.
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1970 GTO (Granada Gold) - 400 / TH400