OK I've read all the post's about the TKO 500 got a question before i embark down this path.
Why can't you use the stock bell housing and clutch?

I have a 85 IROC with a L-31 350 TPI and I converted it from the 700r to a WC-T5 and it has 3:42 gears.
I also replaced the stock ECM to a FAST unit.

 

With the proper too you can use the factory clutch and bellhousing. Just need the spacer adapter for the bellhousibg to trans. Helps with shifter location as well

 

The stock bell has a tilted bolt pattern.
The adapter plate covers this issue.

Or, enough guys say they're using a Lakewood. So the 15020 is an option more than likely. Or other numbers if you're getting away from the stock slave/ fork.

 

Call Fortes in Framingham Mass. Mike Forte will be able to hook you up with what you need.

 

Thanks Guys for all the info

 

ok guy's why do I need a spacer?????? I'm guessing the bolt pattern is different?

 

The spacer for the stock bellhousing allows the tko sit in a straight up position, whereas the factory t5 sits at a angle to the driver side about 17degrees.

It also moves the trans back 1" which helps with shifter fitment because without it the stick usually ends up under the ashtyay.

Like mentioned before, call fortes parts connection, he will set you up with everything you need. They are good people.

And get a tko600, the tko500 has a pretty low first gear and is more suited for trucks or a car with very high (numerically low) rear gears

 

ok, my car has the stock 3:42 gears with a trutrac diff

 

Use the tko600
I have 3:70 gears and a tko600 and I would not want first any lower, your should be pretty ideal.

 

I like OD, so I would probably go for a 2.87 / 0.64 TKO 600.

You might find a little more rear gear preferable, like 3.55 to 3.90, depending on what you like.

As far as bellhousings and clutches, determine if you're going to stick with the external slave / fork of the 84-92 third gen. If you're changing to a hydraulic throwout bearing, your options on bellhousings (and skipping the adapter plate) broaden.

 

This is great information here and a few things to think about. Thanks guys!!!!!!!!!

 

It will likely be a memorable experience, too. Lol.

 

I used to have a TKO II (same gears as the 500) and that super low 1st was a pain in the ***. I have a 600 now and it's great. Good advice.

 

Yeah. Mike Forte has an odd sense of humor and nice vocabulary

 

do you have his number???????

 

Just google 'fortes parts connection'

 

ok thanks