THATS IT! Im sick and tired of these nitrous prices.....40$ avg to fill a 10lb bottle.... 40x30 fills= 1200$!!!! I could buy a decent turbo head unit for that cost!!!! Im just getting sick of the nitrous inconsistancies! Im going to ditch the 331 after this season, sell it and put the money towards my project 393 w/ a c4 and port the HELL out of my tw heads.....tech question is... what size turbo would be good for a 393 windor with a c4 that i could drive on the street about 100miles a month and still go to the track a run mid-low 10s? I wouldnt think it would take much and i could have a pretty mild setup with the turbo....now that i think about it, i probably wouldnt even have to port the heads just invest my money in a good cam