Mixing and matching sbc parts and other things....
We are working on my sons project K5 Blazer 4x4. It is an 88 model with the TBI system 350. In about 2 years it will be considered an antique, eligible for antique tags and exempt from any emmisions laws here in Texas so we are thinking about going to a tunnel ram and carbs and aluminum heads with a hyd. roller cam. This motor is all factory original and has the center valve cover bolt iron heads. We are wanting to put pre-87 style aluminum heads and a 383 claimer kit bottom end in it since basically this motor will just be to get it on and off the trailer and make a cruise night every once in a while and will never see any high rpm running at all. Will the old pre-87 heads fit this block? Will these blocks handle a .060 over bore ok even if we have a compression ratio between 11:1 and 12:1? Also I noticed that they make the rotating assemblies with either 5.7 or 6 inch rods. Why is there 2 different lengths?