See www.tyclone.com for complete head conversion docs. Barry - Sy#26 At 10:00 PM 05/31/2000 PDT, Hummer Guy wrote: >Okay, so my engine is blown up (4.3L LB4) and my natural inclination is to >upgrade to the 4.3L L35 (a.k.a. Vortec). >I need to know what I have to do to my Ty intake/etc. so that everything >will be okay as far as bolting stuff up.