Drill a 1/2 hole right after the 90* elbow on the bottom of the exhaust manifold so youu can get a tool in there to gut the pre-cat. Weld in a patch when you're done. You'll want MIL's for sure.
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone
