Some say there are too many blue cobras, but I disagree and would definitely go with the Blue, or an Old English White, or Red for any "do-overs". As far as the shifter is concerned with the TL, I'm sure someone here could chime in, but David Kee could sort you out. I'm assuming you are looking to have a proper operating reverse lock-out via the T-handle? I am personally running a TKO-600 with a replica T-handle shifter. Here's David's site if you aren't already working with him:
David Kee Toploader Transmissions, Inc.
- Allen.