NOS Buick 1964-70 Gas Caps Non Vented. First cap is AC in box, it fits a ton of stuff, for Buicks 1964-70, Skylark + GS except wagons. Full size 1966-70 except wagons. $15.00 +SH from MA.
I was just getting ready to PM him and ask which is correct for my 70 GSX??? He has another style listed... Do you know Thanks Jim. Nelson
Nelson, both caps are correct for your 70 X and will work IF your car is not a CA emission car with the charcoal filter. This AC cap is like an over the counter replacement. The $60. cap is what would have come on it from the factory. I guess it comes down to how fussy you are.