ive decides to ditch the 347 base stroker,im contemplateing the speedomotive 438 with the dart iron eagle block all forged internals,ive already got the afr 205,if im going to spend 5800 dollars on a short block might as well go bigger,BUT.... im torn between a 427 or the 438,both will have the 4.125 bore but the stroke im couriouse about,427 will have a 4.00 stroke 438 will have a 4.10 stroke and a 1.60 rod ratio, or 1.68,all these numbers i cant remember.veh will be s/c will have the holley roots 174 for now,probly all i will get out of it on the big motors is about 7-8 lbs of boost "MAX" with the smallest pulley avail,will go with the ati after my wallet has healed up i already have the head and the s/c,thganks for any input/out put guys.