1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I grind them down with a cutoff wheel or air file and then hit them with a spot weld buster. Life is too short to drill out spot welds.
Now that I have 4 years under my belt cutting and grinding I can see that as a timesaver, BUT in the beginning when I never picked up a cut-off wheel, I could just imagine the quick damage I could have done to that inner rocker LOL.
Seriously though - I did cut my floor out with a plasma cutter 1st so I could work like a human instead of having the drill chuck rub on the floor when drilling out. Just be mindful of your cuts!
'68 Camaro with RS conversion
Moser 9" with 4:11
Martz Chassis 4-link and Front Sub-frame
Tremec T-56 Magnum 6 speed
572 BB - CM Engines
Wilwood 6 piston front and 4 piston rear disc
I agree with Don. I use to drill out the welds, but grinding is faster, and leaves a area with no holes for you to weld to. No brainier to me.
1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes. White standard interior. Restoration complete May 2018
I used the HF spot weld cutters after using a plasma cutter to get rid of the mass of the floor. Then I ground off the nugget that was left until it was smooth with the surface. The trick is to just cut thru enough to release the floor metal and not to go though the base metal. Patience is your friend.
I bought a cheap set of spot weld bits from Amazon. For sheet metal they would work OK but the thick metal of my shifter detent they died quickly killing 1 bit per spot weld. I also have used the HF ones which are about the same quality. Both work OK on sheet metal but thicker stuff....they are short lived.
The surrounding metal is no problem...the weld itself is considerably harder
Like any tool, quality has a price so you typically get what you pay for. YMMV