Engine Guru\'s and those that have done vortec heads on a TBI... 2 questions for you. 1) I know the vortec heads require the special intake manifold (for $300 /forums/images/graemlins/frown.gif) because there are 4 bolts per side instead of 6. I think I also read on here that the bolts furthest to the rear are at a different angle. If this is true, will I still be able to bolt the throttle bracket down using these bolts? The bolts are at the same spacing too, right? Also, does the manifold have everthing else I'll need for bolting stuff on? And, do I still mount the egr valve atop the intake even with the exhaust tube crossover? 2) My '90 TBI 350 should be externally balanced. So, how do I balance this engine when I do a rebuild? In 85-earlier 350's you just balance each part of the rotating crank assembly individually, but with an externally balanced I won't have to do that, right? Well then how will I know what weights to use on the flexplate? Do I have to take it to a shop and have them figure that out? Sorry for all the questions...but I'm really clueless on this one. Thanks for your help.