Big Block '67 Valiant k-member/firewall

[cgray521]

I am putting a 440 in my '67 Valiant. I am keeping the OG 6-banger k-member and gonna use aftermarket motormounts. I hae heard talk of notching the k-member (or removing the the rear casting of the 2 pieces) and re-welding it again. Is this necessary? Also on the firewall there is that (a-body) flashing where the floorpan meets the upper section of the firewall. AHas anyone ever just tried to cut off that spot welded piece and massage the sheetmetal, then re-weld it? That damn flashing piece sticks out like almost an inch, so would be nice for it not to be there.

 

[Jim Lusk]

That's a body seam. You could weld it and cut the lip, but it won't be as strong. The only reason to cut the k-member (beside mods for the motor mounts) is for pan clearance. It's not a problem with most pans.

 

[Brad4406]

You can bend over the body seam and then beat it flat with a big hammer. That's what I did. On the K-member, I believe you are talking about cutting the motor mounts off the K-member and relocating them. If that is what you're referring to, yes, it can be done. I've seen it done on the later style mounts, but never the biscuit mounts. Not that I don't think it could be done, I just haven't seen it done.

 

[Frank Mopar]

You might want to consider replacing the k member with a 68 or later to get rid of the cantilivered idler arm. Definately a weak link.