I have a quote for the 2004r from Bowtie Overdrives for a level 2. They state it will handle a steady diet of around 450/500 hp and 400/450 ft/lbs. of torque. I figured with the 327 that would hold up just fine?? I wouldn't mind the powerglide if i could get more torque out of it for off the line fun. I can get a th350 pretty cheap just figured the overdrive would be nice. My wife will also drive the car from time to time so i have to account for that. The debate between the 2004r and 700r4 is all over the place with which one works better!

 

Level 2 200R4 sounds $$$. Th350 would work out well for what you've got. More zip off the line. Try it with the 3.08 gear, you might be happy with that set up. Good luck with that beautiful Camaro!

 

Off the subject but what size rims and tires did you go with on the front and back? I also have a 67RS but the motor and trans were swapped for a 350 and THM350 transmission.

 

 

They look nice I have been trying to figure out what will fit and have looked at so many sizes. I did not want to buy something just to try it.

 

I have the exact same car as you, numbers matching 327, 275 hp convertible. Only marina blue with a white top & a 3:55 posi 12 bolt. I switched my power glide out for a TKO 5 speed. Now I'm the coolest kid on my block. This is a popular combo. Lot's of people like to row gears in an old muscle car. With the overdrive 5th gear I get better gas mileage than the pg & much better response off the line.

 

Finally decided on a transmission. Getting a 2004r from Gear Star and cant wait! It comes with a 3 year warranty and everything needed for the swap. Only decision left to make is 3.73 or 4.10? With OD and 4.10 they said I will be running at 2300 to 2400 rpm.

 

4:10 will be more gunt off the line but highway cruising will suffer a lot,I'd go with the 3.73's given you stated you mostly want a nice cruiser with a bit of grunt off the line.
It'll still be a huge improvement at the stoplight but she'll also purr nicely down the freeway and get decent gas mileage doing it.

 

Powerglides came in two favors - L6 have a 1.84:1 ratio and V8's came with 1.76:1.
A THM350 with 6 inch tailshaft would be a direct replacement, 2.52:1 first gear ratio, but 1.00:1 top gear ratio and would have to add a ball stub on the bottom hole in carb lever and a cable bracket holding the kickdown cable.

 

Wanted to update the post. I got the 2004r and 3.90 gears with posi installed. It is like a new car and a lot more fun to drive. Runs great down the hi-way. Next will be suspension work.