The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Did chevy really put wholes in the 3100 frame for wheel base ?

mr48chev · 01-04-2018, 06:25 PM

Most MII aftermarket manufactures set the front axle center line at 18-1/2 inches from the center of the front spring shackle bolt hole. I've never figured out why but the first thing a lot of guys do "cleaning up the frame" is get rid of the piece that is riveted in that the shackle bolt and bumper bracket bolts bolt to.

As for the exact fore/aft location of the wheels in the wheel wells I'd say that is personal preference. It has to look right to you when you are done.

DsRaven gave a pretty good tutorial on setting the frame up to work on it and that is well worth following. Getting the frame level and square and well supported before you start fabbing on it is a must. The only thing that would top that would be having a frame table to hook it to.

01-04-2018, 06:25 PM	#8
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,345	Re: Did chevy really put wholes in the 3100 frame for wheel base ? Most MII aftermarket manufactures set the front axle center line at 18-1/2 inches from the center of the front spring shackle bolt hole. I've never figured out why but the first thing a lot of guys do "cleaning up the frame" is get rid of the piece that is riveted in that the shackle bolt and bumper bracket bolts bolt to. As for the exact fore/aft location of the wheels in the wheel wells I'd say that is personal preference. It has to look right to you when you are done. DsRaven gave a pretty good tutorial on setting the frame up to work on it and that is well worth following. Getting the frame level and square and well supported before you start fabbing on it is a must. The only thing that would top that would be having a frame table to hook it to. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.