Frank/everyone who replied. Thanks alot for replying.A good friend of mines brother is maching my 401 for me at the shop where he works.He's doing it in-between a TON of sb chevy circle track engines. Otherwise i would "NOT" be able to do it right now....as i'm still laid-off!!Thats about ALL they do...sbc circle track stuff,so he is not famillar with the 90 degree intake to head geometry.SBC is way diferent angle.I'm glad he asks me for info...instead of just screwing it up!! If anyone has the formula or a way that they figure it, PLEASE let me know..email me...call me 309-338-3210. They need the info NOW. THANKS again,Joe __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/BaadAssGremlins/ <*> To unsubscribe from this group, send an email to: BaadAssGremlins-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/