That's kindof a die-hard stick-man thing to do. It's a cool idea for sure but with the heft of the Doba, you will miss the Torque multiplication of the TC. To compensate, you will likely want to add some rear gear,at least one size up. Unless you go with a 3.09 low in the tranny.(BudW currently has one for sale). Next is the fact that with a 2.45 rear gear and a 2.66 low, first gear at say a shift rpm of 3200, is around 34mph. And second at 3200 is 55. And 3rd at 3200 is 75. So back down to the speed limit of say 65 =1978rpm in 4th. So basically the 2.45s kindof waste 3rd and uses 4th for nothing but cruising.
Next let's talk about 1st gear. With 2.45s back there, the starter gear will be 2.45x2.66=6.52. This is terribly anemic,even for a 360...35mph will be 2833rpm with 27" tires.And at the shift, the Rs will drop to 2045, and this is now strictly a cruising rpm, cuz acceleration from 2000 with a 4.70 final-drive ratio will be incredibly slow. So imagine yourself keeping up in traffic at said 35mph. You will either keep it in first @2833rpm, or be shifting back and forth. Back and forth. Back and forth.
Next try 45mph; another common speed limit.This is too high for first @3643, and a tad low for second @2630, and again in third it is a cruiser only gear @1917rpm.Accelerating from 2630 in second @45mph(a final drive ratio of just 4.70), will a 2ton brick-faced Cordoba will also be rather slow. But downshifting to first will buzz it up to 3643, and away you go.
So what Ima saying is 2.45s gotta go.Unless you really, really, really, like shifting.
So if you're gonna do this, it behooves you to study your driving habits, and figure out where your engine makes a reasonable good amount of torque, and put the right gear in the back to put you at the right rpm for your useage. Then it will be fun.
Otherwise you could wake up the morning after the install with a turtle of a combo.
As an example;
I have a 3650 pound tank of a 68 Barracuda with a 4spd,and a warmed up hi-comp 360.It has 3.55s out back. It likes a starter gear of no less than 10/1, and it makes enough torque with that gear to annihilate 295s .My second gear makes a final drive of 3.55x1.92=6.82, and the warmed up engine can initiate a spin with that up to and beyond 50mph. This second gear puts the Rs at 35mph to 2965. At this rpm, blasting off is easy. Dropping it into third gets me 2161rpm a nice comfortable cruising speed,but I rarely do that. I usually throttle back to 2800 instead, where the speed is 33mph. This is comfortable, and the engine has plenty of pep to play in traffic.
But now, I have a well-built engine living on the edge of too-high a compression. The way it is put together favors low-speed torque. Your 360 if stock, does pretty good with the stock cam, so unless you are planning a major rebuild, do not change the cam to a longer duration one.
But do swap out the rear gears to at least 3.55s. More is better. Consult your driving habits. If hi-way travel is a consideration, choose well.
Peace/out.....from a one-time,die-hard,stick-man, now at 63, not so much any more.....