340 to 416 stroker build need advice

I plan on putting a 3.91 or 3.73 in the existing 8 3/4, along with going through the whole axle - brakes, axles, etc. I want this car to be about as mean as possible for being still called a street car. A couple of questions:

1. No stud girdle? The guys at Hughes made the impression that anything above 500hp or close, it was required on the 2 bolt main.
2. I agree with you guys that they are probably upselling on the iron rams due to markup margins, and I've never had a car with aluminum heads due to budget woes, but now being a little older, wiser, and having a little more bread in my pocket as compared to my high school days, I'd really like to run the EDDY heads as that was always the "holy grail" for making power. Also, I've heard cars that are 9:1 comp and I've heard cars that are 12:1 comp ratio, and the 12:1 always had a nice crackle to the exhaust that I envied. I wouldl ike to come in at 10.5 to 1 with the EDDY heads and still be safe for 91 octane. Here is a link to what Hughes is comparably offering in heads. Hopefully this isn't against the forum rules.
EDDY's
http://www.hughesengines.com/Index/...cw==&level1=Q3lsaW5kZXIgSGVhZHM=&partid=22132

IRON RAM (I know these are magnum but they have LA style too)
http://www.hughesengines.com/Index/...aW5kZXIgSGVhZHM=&level2=SXJvbg==&partid=23950

Here are the cams I'm looking at as well:
Hydraulic
http://www.hughesengines.com/Index/...ZW5naW5lcw==&level1=Q2Ftc2hhZnQ=&partid=21862

Solid
http://www.hughesengines.com/Index/...&level2=RmxhdCBUYXBwZXQsIFNvbGlk&partid=21803

P.S. TTI stepped headers? OR? Clutch recommendations? Thanks - Nate