hi i have a 1989 camaro with a 700 r4 v6 i know that the v6 700 r4 wont fit. i am putting a 350, 400hp. in it .. tci makes two 700 r4
a lock and a non lock what does non lock up and lock up mean and what one should i get cause the onlly reason im look tordes the 700 r4 because of the over drive and the th 350 doesnt have over drive .. soo should i get the the 700r4 and wich one or should i scrap the whole idea and get the th350

 

If you plan to run on the freeway alot I suggest the lock-up..with a non lockup you need to run a good tranny cooler....700r4 is the easier swap if you ask me.....now on the track only car I suggest a th350 gear ratio is a bit better.

 

If your reasoning behind wanting the 700 is the overdrive then that tells me that you plan on driving this car on the street a lot more than at the track, if at all at the track. So you should definatley go with the 700.
As for the lock up and non lock up, that has to do with the torque converter. The lock up feature locks the torque converter, electronically, at a certain RPM to give you better gas mileage, among other things. It locks it at the same speed as the engine. I'm sure someone else can explain it a little better than me, but I hope I gave you the basic idea. And please, if I am incorrect about anything, someone correct me.

 

http://auto.howstuffworks.com/torque-converter.htm:)

 

I'd go with the lock-up version if the vehicle is driven regularly on the street.