what heater and rad hoses do i need?

Johnny Dart said
A-bodys use what are commonly called 19" and 22" radiators.
19's were used in /6 and 318 cars. 22's could be used in any of the A-bodys with A/C or heavy duty cooling.

Measure the width of the radiator opening .It will measure a little over 22".
People have put bigger radiators in,but you have to cut the radiator opening.

so you are talking about width then...i already have the rad, shroud, and fan all mounted up with no problems whatsoever...the side mounting tabs of the rad had to be modified slightly, but thats it...and the hood should close fine with this rad as well