Well I got my TH400 trans sitting here and know what flexplate to run but have no idea what convertor to use with it considering I was gonna run 4.30 gears with my 12 bolt because Im 6 speed right now. Im running a 232/232 cam with a wilson 95mm tb and 92mm intake manifold along with all the regular boltons except EWP and will eventually add a set of trickflow heads. I was figuring on running something in the 4000 range to be a little easier on the car since I'll be running a tranbrake as well. Let me know what you recommend for a setup like this.

 

You need a custom built converter. i can spec one out for you if you would like. give me a call at 1-866-726-8358

Greg

 

lsx car, get a gen1 sbc converter, TCI flexplate and use the spacer it comes with. Get longer bolts from Sears and ure done. JUST had to figure this out with my th350 swap a week ago and i had major headachs tryin to figure out what to do.

My set-up---

6.0
th350 trans
gen1 converter for a th350
TCI flexplate

 

Go with FTI, you can have a custom converter built that you dont need anything other then the TCI flywheels, no spacers or anything

 

heres the thread u can look through. And FWIW, im sure a gen1 converter will be a lot cheaper then a custom lsx converter if ure a little tight on cash. Not knockin FTI im sure there converters are badass!

https://ls1tech.com/forums/automatic...-what-use.html

 

Im not sure why you think that. All you have to do it extend the snout on a regular 400 converter otherwise it is a just a th400 converter that everybody uses. Same bolt pattern, same input shaft.

Greg @ FTI will get you squared away. I couldnt be happier with mine.

 

I got a convertor to use guys, that came out the car I got the transmission out of. She said I can use it and see how I like it and buy it off of her.