"...9 x 352 HP = 3168 lbs..."
Not sure where you got those numbers.
According to the Class Racer Info site, it looks like the current hp factor is 338hp.
http://www.classracerinfo.com/Engine...4&MAKE=Pontiac
9 x 338 = 3042 + 170(for driver) = 3212 lbs min weight for C class, if I punched in all the correct numbers.
She said that in C/SA it ran a "...10.31 at over 125 mph..."
She said that in D/SA it ran "...10.40 at 124 mph..."
9.5 x 338 = 3211 + 170 = 3381 lbs min weight for D class
So, maybe 124 mph @ 3380 lbs will give you guys the numbers you need to make a closer estimate of power ?
Guessing they probably ran at least 20 lbs or more heavy, to be on the safe side. So, I'd use an even 3400 lbs for the D/SA min weight, when punching in the numbers.
When I punched in 10.40 @ 124 mph @ 3400 lbs, the Wallace hp calculator shows somewhere between 596 & 506 hp. That's quite a range, so I don't know how accurate it could be. What online 1/4 mile hp calculators do you guys think may be fairly accurate ?
http://wallaceracing.com/hpcalculatorquarter.php
This calculator says it'll take 506hp to run 124 mph in a 3400 lb car.
https://racingcalcs.com/quarter-mile-calculator/
This one also says 506hp.
https://www.tciauto.com/racing-calculators
Same for this one. Apparently, several of these are using the same formula, which, according to this site, must be "HP = (MPH ÷ 234)³ × Weight".
https://www.gregraven.org/hotwater/c...p-from-qm.html
IF this formula is close to accurate, Randi Lyn's engine has to be makin a little over 500hp, minimum.