The way my boy is doin it is cutting it first,then your supposed to heat cast b4 u weld to it(oven),drilling all the plates with holes,then reinforcing front rear and sides,then finish it up by plug welding everything...so just like homie above siad u just have to know what your doing!!! They actually make a Welding rod that is cast but its for cast iron...just wait till u all see my rear trailing arms teyre f*
$@ing SICK!!!!