Hoot RATDOC had the Goodmark cowl hood on his old 6.5 Burb and was quite pleased with the result, really lowered underhood temps as well as looking good, I'll go that route myself eventually, only problem is for me to decide which way to go ram air or cowl air, I think I like the look of the ram air hood better than the cowl but if cowl is more effective at lowering under hood temps that will be the decision maker for me.