Is there any other performance brand out there that makes the stock diameter balancer for the truck pulley spacing besides ATI?

Almost everything I see available is 25% underdrive or 10-15% overdrive. Seems weird with as many truck blocks being swapped that there is a lack of options for the truck pulleys spacing.

If I went with a 25% underdrive, I have to replace some pulleys for alternator and powersteering correct?

 

Not a stock pulley but a nice setup here. It also comes with a alt. pulley https://m.summitracing.com/parts/sum-c2520 You don't necessarily need the extra pulley's unless you are having charging issues.

I went with the summit 25% pulley for my Ls1 and it's a very nice pulley. No alternator pulley and I have zero charging issues.

 

Yeah been thinking about that one from summit. Seems to be the same manufacture as the trick flow damper which is just a black painted version. Was kinda worried about charging and having to start changing all the pulleys just for a damper.

Might give the ASP camaro pulley a try its 15% under pulley. Also, looking at the Romac pulley that texas speed sells.