I'm pretty sure I used a Fram PH 13, 1 quart filter on my 69 camaro, but that was 30 years ago, I had big block trucks for 10 years after that, my brain is foggy, those might have been PH 13's, but on the big blocks I use the 2 quart filter. I'm pretty sure the PH 13 is not the 2 quart filter for the big blocks.