I’m in the same city as you and run a mopar performance 402 crate. (435HP 460 TQ). I’ve run 4.30, 4.10, 3.91, 3.23.
billet 2800 stall that foot brakes to about 2450 before pushing, flash stall is aright around 2800.
It liquifies the ties with 3.91-4.30
It boils tires with 3.23 (if you want it to) but also does hook up sooner.
27" x 10" tires
I think the perfect gear for me will end up 3.73. No matter how often I get tired of the car revving high and using a lot of fuel in favour of highway gears (3.23) I always get a little bored and want to head back the realm of more ‘city fun’ gears. The occurance of any of us (me for sure) of doing a lot of highway driving in our muscles cars is not often, even though that is the justification for changing to a 3.23 to begin with. Which has made me come to my ultimate decision to run 3.73 and just suck it up when it comes to higher revs and fuel consumption on the highway for the limited number of trips I’ll do that way in favour of better and more fun around the town gears.
Unless you have a pretty rank cam it’s probably not making 400hp. I have 42 cubes more than you with a pretty lumpy cam (235@50, around 515lift, 108 centerline), 9.0 compression, decent flowing Magnum R/T heads and it only makes 435.
Be honest with yourself regarding how much highway you want to do. Perhaps A 3.7 or a 3.9 gear would be more ideal.
I’d stick to a 2800 maybe 3000 with your car.
Which, by the way, what are you driving? Maybe I’ve seen you around or can keep an eye out for you this coming year?
AJ/formS - Calgary is 3500 feet, Edmonton track is 2200.