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  1. 1970coronetrt

    Dont know which fuel octane

    I'll try to see wich msd I have if I don't know I will send some pics
  3. 1970coronetrt

    Dont know which fuel octane

    So the can is lunatiu 533 lift I think Carp is holley xp850 I haven't drive alot but I think it will go above 200F ESPECIALLY NOW IN SUMMER So will stick with 20w50 and see in winter maybe use 10w40
  4. 1970coronetrt

    Dont know which fuel octane

    Why your saying that It's just about 53c we can handle that At night 45 to 47c that's it
  5. 1970coronetrt

    Dont know which fuel octane

    That's right Thanks all for your response I think I should feed ot with the best one we have here 98 which will be your 93 octane to be safe Any recommendations for spark plugs ? And engine oil type Previous owner use VR racing 20w50 ? Which viscosity will be the best ?
  6. 1970coronetrt

    Dont know which fuel octane

    Hello every one Just owned 1970 coronet rt Original was 440 magnum But now it's 69 383 stroked to 426 906 heads Compression ratio 10.5 to 11 What type or what octane should I put ?
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