pulley line up

[george berube]

i have a 1969 427 motor that i rebuilt and i am having trouble lining up the a/c pulley belt. it has a three pulley hamonic balancer a two groove pulley water pump and has power steering and a/c.It seems that i need another pulley groove on the front of my water pump to line up with the a/c. It has what they call a short water pump.I am going by the build book and it seems that there is a third groove on the water pump. Is this right? I am using a fluiddamper harmonic balancer and march performance pulley setfor a big block. Do i have to go back to the standard pulleys? Any info on this subject would be greatley appreciated.

[Joe L.]

Re: pulley line up

George-----

ALL 1969 Corvette big blocks used 3 groove waterpump pullies (although some or all L-88 MAY have used a 2 groove "sandwiched" with a 1 groove front pulley). The front groove position was used for the AIR pump and A/C compressor drive.

I don't know of ANY Corvette big block application that ever used a 3 groove crank pulley or 3 groove crank pulley system.

I'm sure that the fluiddamper can be used with a stock pulley system, but it may require spacers. I can't tell you anything regarding the "March Performance Pulley".

[Joe L.]

Re: pulley line up

George-----

ALL 1969 Corvette big blocks used 3 groove waterpump pullies (although some or all L-88 MAY have used a 2 groove "sandwiched" with a 1 groove front pulley). The front groove position was used for the AIR pump and A/C compressor drive.

I don't know of ANY Corvette big block application that ever used a 3 groove crank pulley or 3 groove crank pulley system.

I'm sure that the fluiddamper can be used with a stock pulley system, but it may require spacers. I can't tell you anything regarding the "March Performance Pulley".