I'm planning a 425 RWHP 396 LT1 95 Z28 build. I would like to know what I should about the 4L60-E. I heard I should just go with a Turbo 400 but, I want to keep as much factory as I can get. Your thoughts?

 

heres were im getting my trany from. have a look and see if its something u like.
http://www.transmissioncenter.net/4l60e.htm

another place thats good.
http://www.performabuilt.com/gm%20pe...d%20truck.html

 

depends on what you're using the car for...for a strictly track car, i'd go turbo 400...for a driver i'd keep my overdrive and build the 4l60e and go with performabuilt or FLT

 

I'm ordering a Performabuilt next week for my 4l60e, my goal is 425-450.

 

Is there any way I can convert my 4L60-E to a 4L65-E?

 

check the two sites i gave u and see what they offer and try this one also.
http://www.700r4l60e.com/
just got my raptor level three with the raptor drive and a couple other additions. hope it works good. find out soon. lol waitin on the headers.

 

Is it possible to convert to a 4L65-E without any major mods?

 

yes...4l65e is just an upgraded version of the 4l60e