It is often stated that the ram air D port heads flow the same as other D port heads. I have yet to see any 68 #31 ram air head flow numbers that prove that.
If someone has them I’d be interested in seeing it.
The 31 heads had different, taller, valves and different valve springs than other D ports. I suspect these were used to help control the 744 cam wide profile that was used on stick cars. I also suspect it allowed racers to use a bigger cam without changing springs.
I’ve spoken another 68 ram air 1 4 speed owner. He agreed with me that they went way better than any D port Pontiac they have owned or driven. It was hard to keep the tires from spinning in the first 3 gears. I took an owner of a L79 375 hp 396 camaro for a rip in my 68 ram air car. His first words getting out of the car were “how much do you want. It will beat my camaro no problem.”
I’ve driven many Pontiacs. None could touch that Firebird unless it was very well built.
So, in my opinion as much as I’d like a 400 HO car, the ram air 1 4 speed would have no problem beating it.
If you want to beat everything else get a ram air 11 Firebird. Look up Jim Mino. He left a lot of Hemi’s, boss 429’s, L88’s, LS6’s and pretty much everything else behind him in pure stocks.
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