John, I've got 4 wheel discs on my K and am not real happy without the power assist. I've been told I can run just the front circuit through the booster which would subsequently assist the unboosted rear circuit but I;m not quite sure I believe it nor have I tried it. There is a company offering a dual remote booster / slave assembly, it is essentially two small units mounted in tandem and ran around $700 bucks or so. If I recall it was too large to mount under one fender and I'd have to separate them and put one under each fender. The other option if you can find the info would be to try the volvo unit you mentioned... do you have any details? A service manual? Size? I would like to try one of these options soon. The other issue for me would be to figure out how to run it with an engine that's only making 7inches of vacuum at idle. FYI for anyone updating brakes in my opinion would be to go to discs in the front and leave the rear drums alone. Sure the vented / slotted rotors look cool but any of the kits using the '79-'85 GM rear calipers should be avoided like the plague...IMO. Also, the Wilwood kits use calipers that don't have dust seals on the pistons and hence aren't exactly meant for longevity if used regularly on the street. Mike Laiserin Phoenix, AZ In a message dated 9/21/2008 1:06:48 P.M. US Mountain Standard Time, spiers@xxxxxxxxxxxxxx writes: Along with Carl's request, has anyone successfully converted a 300-J or 300-K with the remote booster to a dual-circuit master cylinder? I looked into doing this at one point, and the one solution I came up with that would retain power brakes is to use the original booster for the front circuit, and add a second remote booster for the rear brakes. The remote booster does certainly complicate the issue of going dual circuit. A 1968 Volvo 122S wagon I once owned had such a booster that handled both circuits - I might have to consider locating one of those., but they are scarce. John Spiers Lake Worth, Florida **************Looking for simple solutions to your real-life financial challenges? Check out WalletPop for the latest news and information, tips and calculators. (http://www.walletpop.com/?NCID=emlcntuswall00000001) [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/