[Spyderman]

Hi, Some 427so questons I need some help with:
1.) Are there specific types of bolts that attach the cyl. heads to the intake manifold. For instance, are they slotted ?
2.) Are there any distinguishing characteristics to the valve covers ? what were original ?
3.) are original alternator brackets easy to find ?
4.) Are original aluminum heads easy to find in almost new condition or nos condition, How about used condition with a different size valve ? Are they different value ?

Sorry for all the questions. I am putting the finishing touches on a motor(427 sideoiler)and thought I would check with the experts. I am trying to decide whether to port and polish a set of " in the box"thunderbolt" heads and change to a slightly larger valve. They are aluminum "c5".
Are original dented valve covers better than repro valve covers ?
Thanks alot for your time.
These questions seem so dumb I better remain anonymous !