Will these fit my truck

[stevewhitmore]

Help-I am trying to put a new exhaust system on my 69 SB
I found these on E-Bay
http://cgi.ebay.com/ebaymotors/67-72...1%7C240%3A1318

I now have rusty headers with rusty everything to the rear
My truck was a 6 Cyl & 3 speed, now it is a 307 or 350 with automatic trans
I want to go to ram horns and then go possibly with the complete 2 1/4" system from LMC but replace those turbo mufflers with flowmaster 40's and exit in the rear or out the side
Questions
1. Will these work on my truck
2. Where do I buy the studs and bolts to mount them and what do I buy?
3. Can you buy just the down pipes from the manifolds and then connect muffers to them and then out the side?
4. Thes are "aftermarket" manifolds, anyone had any probblems with those?
5. These say 2", will they bolt up to a 2 1/4" exhaust
Sorry for all the questions and thanks for any advise