Why is it that there are no roots type blowers for early 340's?

kool thanks for posting,,,dyers is the orignal guy behind the street super charger movement,, last time i was at dyers he was cncing rod for the roundy round world,,and not making any blower intakes or parts,, he told me the blower thing was dead,,,,guess he woke up,,,nice guys to deal with my blower and intake are early dyers stuff,,,and hard to find also try BIG ALS TOY BOX hes a great guy to deal with also