Small block crane rocker arms

based on what i know ( which isn't enough ), if these rockers are for a flat tappet cam, they would fit a set of 1985 '302' swirlport heads for a 1978 '318' / hydraulic lifters appplication ?? can you confirm ? i think i remember my stock rocker shafts being about .875" dia .. these i assume will fit the stock '318' shafts ?
i'm trying to finish up a mild upgrade to a '318' i'm putting in a 1966 barracuda .. no strip action, just some street fun .. i just had a 1978 '318' bored .040" over; KB pistons w/ eagle rods; 9.9:1 CR; i'm putting a set of 1985 '302' swirlport heads on that i just had redone ( i was told they would bolt right on / didn't check for myself / how stupid am i .. right ? / do you know for sure if they will bolt right up when i get that far ? ); lunati 60402 cam ( hydraulic lifters ); using a vintage holley street dominator intake with a holley 670 CFM carb; hopped up '904' tranny; 4.10 posi .. do you see any booby-traps with my combo listed ?
was looking to implement your adjustable rockers to better dial in and facilitate the non-stock pushrod situation i have created with my engine block tweaking ( had to take about .010" off my deck / will probably have to get a custom length pushrod ) ..

all comments welcome from forum members ..
thanks guys