I'm currently building a Roots-blown strokermotor.
It will be mostly streetdriven so it will get an alternator and a PowerSteering-pump.
What options are out there to get all this to play nice together under the hood?

I would buy the pulleys and brackets for the alternator and power steering pump and then find the right lower blower pulley tto use, the snout on most roots superchargers for BB and Hemi Mopars will have plenty of room to clear the other parts inboard on the crankshaft

I've got most of the pulley's already in possession (v-belt and blower), but I'm trying to figure out how to mount the crank's blowerbelt pulley.
I've been eyeballing it for a while and I would think the v-belt pulley should be in it's original position, as not to cause alignment/spacing issues with the alternator and P/S-pump.

My main worry is having to mount the crank's blower-pulley too far out with a spacer of some sort, which might cause more stress on the cranksnout and balancer. The blower's pulley would have to be spaced out the same amount.

Do most streetdriven blowermotors have a need for a balancer actually, or is just a simple hub to mount the pulley(s) on sufficient?
I understand having to make a new timing mark on the hub if the balancer itself is left out.

Contact March Pulleys to see if they have a kit for your application

I use the PS when I 1st got my blower and a 2v is used between the ballancer and blower pulley.You can shim out the PS pump with washers if needed and the PS pulley i had was for an a/c car.I have my 2 vee pullays still on and it has not stressed the blower or crank snout at all.
ps: are you using a belt drive waterpump or electric?
Stock alternator location or low mount?

I've got a CSR electric waterpump which I'll be using.
The engine-block is half-filled so it probably needs some good cooling during low rpm and idling.

Alternator will be mounted in the stock location if possible. Probably will be using a more modern smaller alternator.
I've ordered a 3.3" thick piece of aluminium 6.2" dia. roundstock today so I can make my own v-belt pulley on the lathe if needed.

The p/s belt will be close to the w/p but will clear it using the outer vee pulley to drive it.I think the stock alt location is a problem when not using a w/p pulley as it is mounted higher than the p/s pump.I went to a low mount alt[GM SI10] after I got the electric w/p.

Thanks.
I will try to do a mockup this weekend to see where this will end up.

You don't need a harmonic damper (balancer) on a Roots blown engine. People run them because they don't feel comfortable running an engine without one, but it isn't needed. That big belt does a great job soaking up harmonics. I ran a roots blown 528 Hemi on the street for 5 years, and shifted it at 7 grand running low 9's at the track, with no damper, just a hub. No high dollar crank, either. Just an Eagle 4.150 forged crank. I recommend adding a second keyway 180º from the stock keyway on the crank snout.
Personally, I would run 2 v-pulleys behind the crank pulley, and low mount the alternator.

Just had my motor built by Barton and asked him about the need for a balancer. He said that while you could get away without it on a blower motor why would you? He said if you could run a balancer might as well do it. So mine has one.

Although they say you do not need a harmonic balancer when using a blower belt,I ran that way for 6 years.After the second hub failure,went with the ATI superdamper and shortened the blower snout to bring the drive belts closer to the engine reducing the amount of spacers required to align all the pullies.I brought the water pump pulley so close that I had to change to a buttonhead bolt so the pulley would not rub on the water pump bolts.

The old setup

Another

If you can and get the chance show some pics please!I use a march under drive pulley and it rubbed the w/p and also used the button head allen bolts.I hope thing are going well.

I've found out today that in order to be able mount the belt at all, the pulleys need to be spaced out about 1.5" away from the damper and blower snout.
Any closer and the belt will rub the waterpump housing.

Noticed today that the boltholes in the balancer are thread with UNF and are only 5/16". I'm thinking of enlarging these to 3/8, just like the threads in the blower snout.

I've started making the custom V-pulley for my motor this weekend. The 'damper-side' is pretty much done. Now I need to create the V's and a register hub for the crank beltpulley.

I had a spacer made to fill the damper around the crank bolt to make a flush mount to the vee pulleys and support it all better.

The register on the damper is 2.25,blower stuff is all 2 inch.You might have to open up the ID on the spacer enough to get flush on the damper.

I've got 2 sets of belt-pulleys to pick from; One set made by Mike Kuhl for a square-toothed belt and the other by BDS for a round-toothed belt.
But both pulleys already seem have a larger sized ID.

I still need to make the 'frontside' of the v-pulley/spacer, but when I'm exactly sure about it's required thickness I will finish it in the lathe.

I need to get myself a longer belt aswell as the ones I have are way too short. The large Indy-intake puts the blower a bit higher than other blower intakes I pressume.

VZCharger,
I just noticed you also have a Kuhl-blower on your mill aswell. Same for the INDY-intake.
Just for checking, what is your belt-length?