[outlaw]

im rebuiliding my transmission what types of shift kits are good i have a 390 4 barrel this will be for street

 

[cougarshaman]

Nice to see you still axing questions outlaw.
Sorry I got your 390 hipo post off topic.

Summit has a really swell rebuild kit for the C6 with heavy duty bands if you want to go through the whole thing.
Otherwise, I've used B&M shift kits without any major problems.

 

[cougarshaman]

in fact...

Here's the part number and descript for the trans kit from summit.
TCI-448900
Rebuild your transmission before it's too late.

Ford: 1977-up C-6, pro super kit

The TCI Pro Super Kit has everything to do a complete rebuild: gasket and seal kit, reuseable Duraprene pan gasket, high quality clutches (including extras to make your transmission shift harder), bands, adjustable modulators, high volume filter, and a drain plug kit. TCI didn't include instructions, so if you're new to transmission work, we recommend that you take it to a pro to have it installed.

Sold as a kit. 184.95

I had this very thing saved in the my garage area.
If you're going to rebuild and beat it like a rented mule, then make sure it can take it.