47-55.1 Jaguar Xj6 front subframe swap on 52' 3100 help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**mr48chev** · 03-07-2026, 04:16 AM

The whole assembly unbolts from the Jag with just a few bolts but has a lot of brackets that have to be cut off. This is the one that belongs to a member on here.

This is one I found on the net. It may or may not belong to a member.

Another net find with a GMC frame.

The one I have that I bought in Bend Oregon a few years ago compared to a chevy truck front axle.

A closer idea of mine giving you and idea of where you might notch it.

If the Jag is still complete with engine and trans get it on a flat surface and get under the front and measure from the bottom of the crossmember to the floor. When I started figuring out how I was going to set the chassis up so it was at the ride height I want I would block it up that distance off the garage floor and set the front of the frame on it to see how high the running boards are.

A Jag weighs 4000 lbs if you average out several different weights. I can't find a weight bias but the six weighs about 750 lbs. Less weight means that the rig will sit higher with the same springs though.

03-07-2026, 04:16 AM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 16,395	Re: Jaguar Xj6 front subframe swap on 52' 3100 help The whole assembly unbolts from the Jag with just a few bolts but has a lot of brackets that have to be cut off. This is the one that belongs to a member on here. This is one I found on the net. It may or may not belong to a member. Another net find with a GMC frame. The one I have that I bought in Bend Oregon a few years ago compared to a chevy truck front axle. A closer idea of mine giving you and idea of where you might notch it. If the Jag is still complete with engine and trans get it on a flat surface and get under the front and measure from the bottom of the crossmember to the floor. When I started figuring out how I was going to set the chassis up so it was at the ride height I want I would block it up that distance off the garage floor and set the front of the frame on it to see how high the running boards are. A Jag weighs 4000 lbs if you average out several different weights. I can't find a weight bias but the six weighs about 750 lbs. Less weight means that the rig will sit higher with the same springs though. __________________ 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.



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