Lakewood scattershield

Got my never used lakewood scattershield off this site from jamey out in western pa. Super happy with it. It has the correct 4.8 inch register hole for my 308 bearing heavy duty A833 and ce with block protector plate. Are there any tricks to making these work in an A-body? I am modifying a spool mount k-frame to work with my 400. I am using tubular parts automotive fender well headers that run one tube inside the frame rail so header clearance should not be a problem.