Where are you located. There's two reputable rebuilders on this board. One is Mike Harris around the Cleveland area, and Cahall Performance Transmissions in the Maryland area if memory serves me correctly.
I bought one from Mike in the late fall of last year for $1,400.
Both guys were great about giving information about what they offer & recommend.
I had no bias toward either and I chose Mike because he was on the route from Central, PA to Austin, TX, when my parents finished putting my grandmother's house on the market. I had no shipping costs, so that drove to use Mike.
Clear Image Tri-Ys & Hi-Flow cats to CIA 2.5" X-Pipe & Spintech Mufflers, Mike Harris 4L60E, Vigilante 3,400 RPM Converter, MOOG FT end, Del-A-Lum bushings in new MOOG CTRL Arms, Eibach FT Springs, New Stock rears. Hotchkis Sway Bars & End Links, RAISS, Dynoshaft, CIA Driveshaft Loop, BMR Trailing Arms, Braided Brake Hoses, Taylor Spiro-Pro Wires, AutoMeter 2-5/8" Water Temp & Oil PSI Gauges, Impala Console. ATE Blue Brake Fluid. Skip White distributor. Newly Installed 20's on 1/1/2017
Put your zip in your location, so we know where you are.
I paid $1300 for a heavy duty trans plus $500 for a Circle D torque converter. I installed them myself behind a 454. Depending on how bullet proof you want it, anywhere between $750 and $4000 plus installation, or shipping.
1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, custom fender skirts, Impala rims, Recaros, Blazer console, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check http://www.impalassforum.com/vBullet...1#post11691762
I rebuilt one myself with very mild upgrades (really just a corvette servo and some others that do not require any additional parts) and the parts alone were 6-700 and I did not even replace every part that the performance builders recommend you replace every time.
Project 1994 9C1 Caprice with LT1 - THAT LOOKS LIKE BK HAS WIPED HIS @$$ WITH!
I'll refer you back to this post I did awhile back. I have NOT used them so check and be sure they offer what you want. https://lawton.craigslist.org/pts/5975271734.html
Not knowing where you're located I'm not sure what the shipping would be.