i thought vortecs were all center bolt col, i knew about the angled manifold bolts, they seem to have the undrilled bulges for perimeter bolt rocker covers, is this common to all vortec heads, i readily admit to not knowing much at all about later GM stuff.Vortec heads (copies)
You would need different inlet manifold if running on early (pre vortec) SBC
cheers col, mmmm, CF,,,,chinese factory perhaps,?:incheek:These are not made by GM (can you see the CF or maybe GF logo?) hence no GM casting numbers.
You can see the bolt holes drilled for centre rocker box bolts both visible in forth pic.
No idea who makes them, or how good they are.
Why does everyone and their dog think that a 'z' in the wrong place is cool?Got it!! Michigan motorz
Cylinder Head - GM Chevy Pre-Vortec, 5.7L, V-8, (1969-86) - New
Only pic I could find was for pre vortec. Note the logo