318 Build-up Questions

is that the compression ratio with the 360 heads figured in?i believe you like some 302 casting,318 heads better,and the streetmaster intakes seem to quit flowing after 4500 rpms.i know,because thats what im running right now.my 318 has home proted heads,chet herbert cam,similar specs as the voodoo,but more exhaust lift,matching valve springs,eddy streetmaster intake,heads and intake were gasket matched to 360 size gasket(planning for eddy rpm later or victor 340)i have 1-5/8 headers,with 2.5 inch exhaust,with old flowmasters.the combo is awsome off the line,will really smoke the tires,the mid range is great too,it just stops pulling after 4500 rpms.but my pistons are stock,might have something to do with it