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Well I am gonna have some new exhaust put on my 70 duster with a 225. I need to know what are the best mufflers and pipe size? my plan right now is dual 2 1/2'' out the back with an x pipe and a good set of magnaflows with rectangle slant down tips. Also I have bored it 60 over with a new cam...

Where do you guys get the 1.7/1.44 valves from and how much do they actullay help?

I have an A-833 4 speed tranny with the 4.35'' retainer bearing. What would happen if i used the bellhousing that has the larger retainer bearing hole?

How much do I mill off the head to make 9:1 compression? I am starting stock at 8.4 compression.

I was wondering if someone could tell me if the bolt patterns are gonna be the same? I don't want to end up buying the tranny before i know it will work.

I have got a 1970 duster with a 225 slant 6 in it. I was wondering what are the best ways to bump up horsepower? also what does this motor put out stock?