Built 273, what sure grip ratio with a A833 3.09 first gear

For a streeter; Run as much rear gear as you dare with that engine, as that's the only way to keep it on the pipe.
Imagine your powerband is from 5000 to 6500, about 1500
With 3.55s and 27"tires;you will be on the pipe from 37 to 48, 59 to77, 81 to105,and 113 to147.
With 4.10s, you will be in the zone.................. from;32 to 42, 51 to 66, 70 to 91,and 98 to 127
With 4.56s.......................................................from;29 to 37, 46 to 60, 63 to82, and 88 to115
>Now look at the numbers in the mph-window from zero to 60 mph.
With 3.55s you're in the zone for 13mph.With 4.10s it's 19mph. with 4.56s it's 22mph
The more time in the zone, without tirespin, the quicker you will be.
>Also look at how fast you need to be going to find the zone.
With 3.55s it's 37mph, with 4.10s its 32mph,and with 4.56s just 29mph
The sooner you get into the zone, the sooner you start shaving time.
> also look at the 65mph cruise rpm.With 3.55s; 65= 2867, 4.10s are 3311, 4.56s are 3682,...
>or what can 2850 get you? 65 w/3.55s, 56 w/4.10s, and 51 w/4.56s
>look at hammer-down at 32 mph in second gear, my favorite.
This will be; 2710 with 3.55s,3130 with 4.10s, 3480 with 4.56s...If you can't break the tires loose at these rpms;you'll need to put a little toe on the clutch, downshift, or get some skinnier tires lol. Downshifting at 32 mph into first will get you 4360/5040/5600 well wudja lookit that, the 4.10s at 5040,are right on target.
I also say this, cuz with that cam and just 9.5 Scr, she's bound to be soft on take-off. the 4.10s will help with that, but you might have to slip the clutch some until the power comes on. The solid lifter spec was a smart choice , IMO,otherwise you'd probably be yanking that stick .