Measured and have .484 from open to closed. And since my cam tech card says 465 in.lift,488 ex.lift at valve (if this is acuate actual lift) I will possibly have some interference. These seals are original factory type.Can I use a different type seal (shorter) that will seal good without looking like the 'bug sprayer' truck? Don't want to machine for different seals,anyone give some advice?