The Stovebolt Site Forums The Shop Area Engine Shop get dual master cly. Where?Rear ratio?

I'm going to use my ol'40 half tonne to carry a dirt bike and pull a ATV trailer in the Idaho backremotes. Where can I get a dual master cylinder??? Thanks Tonnes. Jim pea ess, with a rebuit 261 in the Chev, and using it in tough country, should I install my 3:55 or leave the 4:10 rear end alone ? Thanks again.

for the dual master cylinder:

Most folks use a early 70's chevy dual master cylinder unit, with a bracket(that can be ordered from various places online) made to fit it... I'm not sure how the '40 half ton is laid out.. but that is what they do on the 47-55 trucks... the AD trucks.

Is your master cylinder under the driver side floorboard on your '40 ?

-W

leave the 4:11 gears it will pull the hills 100% better 3:55s are nice for half tons whith 216s to keep the rpms down.
but not much good for loads inless you like to drive in third gear alot
you should be able to go sixty all day long with 4:11s and 261 and will be around 3800 rpm
denpending on tire size
my dads 71 3/4 ton is at 4000rpm at 70mph and it has 4:11 gears and 16 inch wheels (I have taken it to 5000 but that was a hole nother story)

woogeroo, the master cylinder is under the floor. old chevy46, do you know the tire heigth(diameter) of a 16 on tire? The max heigth available ? thanks jim

261's really aren't all that happy at 3800 rpm. I would go with 3.55's for towing with one. I'm going to 3.07 with mine. It is a pretty strong engine, especially if you hop the intake and exhaust up a bit.

4onthefloor,I put a Clifford aluminum intake on the 261.KN air system. It's got Patrick's ''mild''cam.Bored 30 over.A Holley 4 barrel(small one for gas mileage).Dual exhaust with hi flow mufflers. Electronic ignition. No idea what it'll do yet. Be on the road in Dec. Am wondering about tire heigth.It's a 4 on the floor with 4;10 in it now.I have Patrick's 3:55 still in the box.

I did not relise you had all that hipower stuff on the 261 I geuss 3:55s would be alright
I never used to like them because we have a
E350 **** van with 351 windsor and auto and it was gutless but we added carter afb carb and edlebrock intake and improved the power a littel

Sounds like a nice setup, ape. Mine pulls hills really well with a stock intake and exhaust with a glasspack and dual point distributor and gets about 19 mpg. I'm sure with a bit of uppage it will do even better. I can haul a full load of barkdust or scrap metal up most hills without breaking a sweat. I worry more about stopping anyway.

Thanks guys. The "oldchevy46" got me envious. Would make a GREAT snowmobile hauler(love to USE those old chevys). NEET STUFF YOU GOT!!! 4onthefloor, thanks, ---I'll post pictures of mine in Dec and give a 'full report'. jim