O/S intake valves...

ok well i have spent a good 3 hrs looking on various valve manufacture sites and summit at there valves...

the common O/S valves are the 1.7/1.44... 4.765 long and .375 stem

well i want to go up to a 1.75 or 1.78 intake...

after some reading i have found that

the Ford 300 intake is 1.783 head and 4.750 long with a .342 stem... good but im not diggin the .015 shorter installed height...

the ford 289 intake is a 1.78 head and 4.863 long with a .342 stem... with these i have the worry of rocker geometry like with the 318 valves... which i still havn't seen a sweep for to see if the geometry is right...

lastly i found on Ferra's site a hemi valve 1.945 head and 4.865 long... but a .312 stem... so it would have to be ground down (head size)...

i am really shooting for a very small stem... at least 5/16 or 7mm...

anybody have any answers...