73 Scamp... Hello everybody

Okay after a little research I've got a couple questions...

Which heads for 350 hp or so buildup? I keep hearing that the magnum heads crack between the valves. (doesn't sound like something I want) Are there any aftermarket heads for these? Edelbrock or whomoever? What about the 80's heads?

Is that toothpick of a rear axle up to the task of 350 hp? Is there a bolt in replacement or should I just find a donor and weld new perches on it? I like fab work so I am not opposed to slapping a 9" or whatever under it.

Oh.... and what trans is in my car and which one do I need for those kind of HP #'s?

later, j