yes its in a 66 mustang.. its so tight around the headers as i dont have cut shock towers, just notched.. Ive got 600hp now.. the car goes great.. yes I was thinking of just spraying it as thats what i typically do. I was thinking the benift of the compound boost was lower iat temps.. run the KB at 7LB and the other power adder at like 10 lb.. and reduce the heat soaking. Its not a race car strickly street stuff.. Im looking to get it all dialed in at 17LB with my stock motor and then build a new built motor along the way.. obviosly fuel system etc... but get all the fab work done now and keep the boost low... I dont think the belt will slip with the 2 blowers... as they will both be lower boost than a single one at high boost. I have room for the procharger... I saw a guy do it on an ls... it seem to work well. I use hp tuners now... but if i need to I can throw a holley on it as i use them on my bikes.. I am stil in the kicking the idea around stage... I think realistily I am looking for 800hp but I would like more maybe lol the felexablity and ease of a procharger is very appealing.. I like turbos but just so much pluming needed if i end up having to do twins.. now..if that KB is not gonna work with the compound then thats a big deal... any more info on this KB seal leaking at what boost level??