The guys at Panhandle Performance who set up my top end said that with some work they can get a little more low rpm flow out of the Canfield 190's than the AFR 205's. (Of course by the time they're done with the Canfields the intake runners are more like 200cc) I was going to go with the Canfields since they would have probably worked well with my combination, but two things made me decide on the AFR's.
First of all, one of my header pipes runs right under my power brake master cylinder. I have that small section of pipe wrapped to keep it from boiling my brake fluid. The higher exhaust ports on the Canfields would have raised my headers about half an inch and I just don't have the clearance. The exhaust ports on the AFR's, on the other hand, are lower than my ProComps and will give me a little more clearance under the master cylinder.
The second reason is simply that AFR's are so highly regarded and there are plenty of dyno results and testimonials out there that show how well they work. Besides, with the article on Steven Rupp's engine as a "blueprint" (very similar build to mine) why try to reinvent the wheel? If I can get 552hp out of my street car, I would be plenty happy!

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'67 Mustang Coupe
424W-KB Forged 10.2:1-AFR 205's-Victor Jr.-Mighty Demon 825-Comp Cams hyd roller.236/.242 .555/.576-Miller rockers-Hooker Super Comps-3" exhaust-Gene Hughes AOD-3.55 Posi-4 wheel disc brakes