Lt1z383

I had a custom top pulley made for my lsa swap I am doing with the lssimple setup and since wasn't going 8 rib figured why not have them do a 6 rib upset to match my factory balancer. Question is guys running the 8 rib upper which end does it ride on? Closest to blower or to radiator? Also those running a 2.50 pulley factory balancer what belt length and is one brand better then another for this setup? Thanks

GM1697

iTrader: (1)

I'd be willing to guess that it's closest to the motor, but the only way to know for sure would be to get a laser to line up the pulleys, and see where you are at.

Vortec350ss

iTrader: (20)

Greame is correct. When you go 8 rib you add 2 ribs to the outside of a 6 rib set up. The 6 rib belt will sit on the inside 6 ribs.

SUTTERERMAN85

iTrader: (40)

No the belt on a 6 rib truck setup runs on the middle 6 ribs on a 8 rib lsa blower pulley.

Vortec350ss

iTrader: (20)

That's true. I didn't read the question that carefully. The LSA blower pulley alignment is ever so slightly inset from out stock accessories. If you go 8rib in everything else the blower 8 rib pulley would be in 1 rib from everything else.

Ford_Assassin

iTrader: (2)

I have the LSA blower on my 6.0, running the stock truck crank balancer. Would the stock (larger diameter) LSA/ZL1 crank balancer work with the correct belt spacing for the rest of the pullies, including the A.C. compressor belt?