6 cyl trans on v8?

I looked again....the speedo hole on my 65 trans is about 1", the 93 trans has about a 1.5" hole. Is it possible to use a non lockup converter and ignore the switch? I've heard that lockup converters are bad news. I haven't had time or place to play with cars since getting married in 92 and having a wife and kids. Damm it's good to be back!:cheers: