Cutting Cast Iron with Plasma

[KS2K]

I am repowering a 1943 Dodge Power Wagon with a Cummins Diesel. The old rear motor mounts are also the spring perch. I need to cut the motor mount away from the spring perch. The cast is .3750" thick.
Can I cut this with Plasma or will I get Hydrogen Embrittlement and weaken the spring perch ? I will be cutting right up to the spring perch. If plasma is wrong, what is suggested.,

Thanks
Paul

[garcia]

I would

use a "Saw-sall" if you have room to use one in there. I have a plasma too, but like you mentioned, will it change the metal characteristics(crystallize the metal around the cut)? Someone in metallurgics should be able to jump in and help you.
G.