What do you think about the whole "cutting and welding of two 350 heads to make a single 292 head?" I have two spare 350 heads that have 1.95 and 1.55 valves in them already? I also have two stock heads for a 4.3L v6 that are identical to the v8 heads, just minus two cylinders... I'm confident in my welding, but... Opinions?