Do you have a 2x3 rear crossmember or is it round tube?

post subject
 

yes its a 2x3 cross member. the cm tubing comes off that. I will post pic tonight hopefully.

so basically all you wanna do is extend a straight 2x3 rail from that stub all the way back to your 2x3 crossmember if i am reading ya rite correct?

That's the way I'm reading it also.
First thing is to get the car set up on jack stands at the exact ride height and attitude that ya want. Then bring in that front stub and get it set up with the exact wheel base. From there you can see where ya need to go as far as extending the front frame rails to that rear cross member.
NOTE ; Spend a TON of time in measuring, moving, measuring, measuring, measuring. And MAKE NOTES !
I like to drop a plumb bob off off the chassis at equal points(swing arm pivots points are good) mark them on the floor on duct tape, and square every thing up off them. REMEMBER that if you move the car even a skoshe ya gotta drop those plumb lines again ! There is absolutely no way you're gonna get the car exactly back in the previous position.

:D :D :D :D :D

x2 with double D! Two plum lines and I myself like the string method rite down the center of the car, and everything you do is measured off the string!

post subject
 

Thanks, Thats what i was thinking.I wanted to be sure i was going down the right track befor i start cutting. I will get some pic up, i got slamed with paper work last night.

Pictures uploaded for injectedrat68

Zip.

http://img.photobucket.com/albums/v5...2/paulscar.jpg

http://img.photobucket.com/albums/v5...paulscar-1.jpg

post subject
 

Whats the rule on 2x3 when you add on. You have to plate it and over lap by how much i would think on all 4 sides. Any special way i should notch the 2x3 to butt togeather, or just butt them togeather flush. That doesnt look right by putting togeather flush.

Re: post subject
 

I have butt welded 2X3 frame rails but i welded a 2"X4"X1/4" tk plate on each side of the butt welded section.

Zip.