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| | | | Joined: Aug 2015 Posts: 16 New Guy | | New Guy Joined: Aug 2015 Posts: 16 | Howdy,
I have a 60 GMC flatbed, with 261 and 4 speed trans w/granny gear.... I want to pull my 18 foot food trailer... what automatic trans do I want behind my 261 ?
Whatever you are doing, have a good time at it..... Ya gotta do it anyway... So, enjoy life !!!!
| | | | | Joined: Aug 2015 Posts: 16 New Guy | | New Guy Joined: Aug 2015 Posts: 16 | Also, I want to increase the power of the 261... should I go with dual carbs ? and headers ?
Whatever you are doing, have a good time at it..... Ya gotta do it anyway... So, enjoy life !!!!
| | | | | Joined: Apr 2005 Posts: 7,441 Bolter | | Bolter Joined: Apr 2005 Posts: 7,441 | More info please. How far do you plan to pull, speeds, hills or flat land? 1/2 ton, 3/4 ton or 1 ton? How much does your trailer weigh? There is a right one we just need more info on how you plan to use it. 
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
| | | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | I know people do it, but I towed a small boat & trailer behind a Dart (225" slant 6, 145 hp) and it was misery unless the road was downhill.
There is no conventional speed equipment that will add 50 hp (my opinion: minimum).
The most practical is probably a turbo (eBay: Chinese turbo from On3 for $500 new) since the engine can remain completely stock except for ignition timing and the oil lines. Only works when you put your foot down. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | GMC's didn't come with a 261, perhaps it was swapped in? Is it a V6? I think they used 270, 302 through '62. A close ratio 5 speed with a 302 should be adequate.
Ed
Last edited by EdPruss; 07/25/2016 3:24 AM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | 1960 was the first year of the V6. If it has a straight 6 it is not original to the truck. | | | | | Joined: Aug 2012 Posts: 28 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2012 Posts: 28 | Maybe 60GMCFlat's truck is Canadian, then the 261 would be correct.
1954 GMC 9314 - 261 t5
| | | | | Joined: Sep 2011 Posts: 131 Shop Shark | | Shop Shark Joined: Sep 2011 Posts: 131 | He lives in Washington state, The truck may have crept across the border just to confuse you yanks. Get that darn wall up!
Our light GMC trucks had Chevy running gear. All the body work was just like your GMC trucks.
1 1955 Chev one ton. 261 engine
3 1962 Chev c-10 261 engine
4 1966 Plymouth VIP 5.7 GenIII Hemi
5 1966 Imperial Crown Coupe 440 engine
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