rebuilding an87 regal

[canadianregal]

is there a forum for 231 na here?
im looking for a good set of heads to rebuild and would like suggestions--do the fuel injected heads have bigger valves?
sorry for wrong forum but i cant seem to find one for info on mods for the 231 na

 

[Quick6'n'-K.C.]

Same heads from late 85 to 88 (MC) , all gp,cutlass,mc,and regals from late 85 had the same 8445 (last 4 digits in casting numbers) heads with the same valves in them. EFI head is identical to a late 85,all 86,87 and 88 g-bodies.
BW