Me and ls1beater did the motor thats in my sig over two years ago. And have never had a problem. I Have solid mounts in the car with no vib's. at any speed or rpm.
I'am having the same problem.
Last week I swap the pro products intake that was on the car out for a holley systemax, and still having the same problem.
Mine is burning 1 1/2 qt of oil a week.
Did you run him with the car thats in your sig??
A guy on the local forum ran one from a 40 roll in a camero and ate him alive with full bolt ons and 150 shot.
I used a miller. Not sure witch size it was it plugs in to 110 outlet.
Yes the factory sheet metal is 22.
I keep tacking the holes on the strut tower. From there forward I had to cut off because the car was wreaked. So i just made new inner fender aprons.
I got some what the same setup as you. This weekend I swaped my pro product intake out for a holley. Had a set of 30's and a meter for them. So I put them on to. Car didn't run worth a ****. They where just to much for it.
The testers that autozone and advanceauto (where I had mine tested) will not find the dead cell in the battery. Find a shop that has a good snapon or other type of tester and have them check it.
You can also check it with a test light if you don't have a DMM. hook it up the same way as 5l5 said. If the test light lights up. Start unhooking the Alt. and starter. If it is still on start pulling fuse's untill the light goes out. What ever you unhook or what ever fuse you pull and the light...