On so im am planning on putting the neon rear disc brakes on my sunfire but i was wanting ro kno what all is needed to make it work an also where on the back plate would i need to machine it?
did you read the how to sticky? that would be my first suggestion. I think I read it about 10 times all the way thru before starting my conversion.
I would also read up on the s-car swap and then decide which to do.
Club Teh Jeffie wrote:I say screw the neon rears and use the scar parts
http://www.j-body.org/forums/read.php?f=3&i=155510&t=155510
Of course I may be a bit bias 
bawhaahahaha you beat me too it... No one is going to do the Neon Conversion anymore after this =) Too much work and effort and money vs the Saturn Conversion...
