305 to 350 motor swap question

[rikoshea83]

I am going to be putting in a 350 motor that will replace my 305 in my 85 GMC. I need to get some new pulleys as some of the ones on the current motor are not the original equipment. I need to order a water pump pulley and a crank shaft pulley. In the LMC catalog, they offer 2 & 3 groove crank pulley and a 1 & 2 groove water pump pulley. I will be running A/C and need to know which combination of the two that will work together. I called LMC and they didn't offer much help. Can anyone help me with this?

Thanks,
Rick