Jetting problem

[Rscarpantonio]

i was messing with my carberatour while i have my top end apart and decided to pull the jet jsut to see the size, its at a 142, i am boring the engine to a 416 and have a mx4 slip on and a k&n filter, thats it for the engine what jet should i run, i am at practically no elevation

[Rscarpantonio]

no help?! please any info is greatly accepted

[clemsonteg]

I think it should be a 148 from the factory, unless someone replaced it with a 142 for either a different elevation or its not a keihn jet possibly a Dj jet instead