yes the 5port will be your best engine for that type of track...

what are the lap times on the track??? if they are very fast like 20 sec or less i would try a 053 pipe...i feel very strongly that the 053 and 086 pipes are the very best power makers as far as pipes go...also i would maybe even go with 1.1 clutch springs and do a lil testing with a 13 and 12 tooth clutch bell gears...i think the 12 tooth may work for you if the track is as high bite as you say...this is the set up im running on my tight high bite track, and the exceleration out of the corners and up to the jumps is unreal...