Which pulley style Sanden 508 should I order with my Alan Grove Brackets?

[kaboomatthe1320]

As title states..  It's a '73 350 w/vortec heads & hedman headers.  I have ps pump & sanden 508 style a/c compressor brackets from Alan Grove in hand.  Is everyone that's still v-belt going with the double grooved pulley or the single grooved pulley on the Sanden 508?  I need to order the compressor.  From alot of pics it looks like most order the double grooved v-belt style pulley??

Please help!!

[VileZambonie]

If I were buying aftermarket pulleys and brackets I would be doing a serpentine conversion. Whether or not you need double or single groove pulleys depends on your brackets and where everything lines up so no one will really be able to answer that truthfully for you without seeing it mocked up.