Re: 1961 GMC 5500 Tilt Cab Project
 

Ill check the casted number on the block tonight.
Looking at Jolly's site, it says the 401 magnum was used in '66 and later trucks.
Mine being a '61, I think I may not have a magnum...

Re: 1961 GMC 5500 Tilt Cab Project
 

The Magnum engines were introduced in 1966 so a 61 would just be the smaller port 401

Re: 1961 GMC 5500 Tilt Cab Project
 

Blast, I'd do the 2 barrel holley then. Unless you like fabrication. Only one of us that I am aware of that fabbed a non-magnum intake for a 4 barrel.

Re: 1961 GMC 5500 Tilt Cab Project
 

2bbl might be the way to go, since I won't be "racing" it.

Re: 1961 GMC 5500 Tilt Cab Project
 

I don't race mine at all. lol Engine is built for torque...Id lose to a 4 cylinder ricer. haha But when towing, it seems the extra barrels help. I towed 10,000 pounds up a grade and accelerated from 1500 RPM in 4th. :thumbsup:

Re: 1961 GMC 5500 Tilt Cab Project
 

No racing here, just trying to look cool, and maybe haul my '46 with it.
I got numbers from the block. 40103079
I included a shot of the vin also.

I got all the running lights working. Left blinker still doesn't, but i think that's in the switch.

Did some spark plug searching today...
Didn't find much.
I'm planning on using a AC 44xls? I think that's what I bought. either way, it's long reach. That's correct right?

Next is to see if any of you guys are trying to part with a magnum intake?

Re: 1961 GMC 5500 Tilt Cab Project
 

Getting a magnum intake will be a bit of a chore. haha Many don't want to part...I got mine and will never part with it because it took darn near a year to get it. lol

Probably a ground issue on the blinker. Really common.