You are well within normal operating rangeJS asked my mechanic about the questions you asked,, he had use a IR temp and said that the temp was 185 to 190.. he said the analog temp gauge is wrong and it is hard to read where it is for an old fart like me. and you do not need to do the radiator. but the scoop will not hurt. and i think it looks bitchen .thanks for some good info. larry xpb 78/455
Thats gonna scoop air like crazy but its also going to scoop everything else (bugs, rocks, sand etc) so youll need rad protection and an easy way to clean it.
Be careful how much "scoop" it has or you may actually cool things to much. (Ie: fall/spring evening)
Also you need a way to contain that air so make sure you seal the sides of the rad vertically from each side of that scoop or the air is mainly gonna spill over the top side....thing of the whole thing as a big ram air.
Keep it up!! Good to see people playing with ideas....someday ill quite procrastinating.....lol.