As some of you know I'm having a S&S 124 put on my BD Mastiff and I also am having the Baker Primary belt drive install. When I was running my S&S 117 which was running a 10.5:1 compression, and had lots of top end work done to it I was running the BDM Spike air cleaner. Which seem to do fine up to 80 mph. anything over that and it would cough thru the carb at steady throttle. Well I'm wondering since I also have the BDM Velocity Stack, which would perform better? Now this isn't the 90 degree velocity stack its the straight out one. When deciding which to go with a while back a well known mechanic in the area told me to go with the Spike, but now with the bigger motor and the fact I'll be running 10.8:1 compression, .640 cam, I'm wondering which would preform better and will either provide enough air? I'm also running the FSD Hotrod Sinful exhaust.