a quick study on intake spacers
I was once considering making my own spacers to correctly align a 4V intake on my 400 block using 4V heads, it seemed easy, folks sell spacers all the time, what I found out though was you need a much thicker spacer then the 7/8″ spacers you could by from Weiand.Ford single plane intakeD1ZX-9424-FA, Roush stuffers
Weiand spacer, .88′ thick with a Weiand end gasket of .42″
I found that the with added height of the 1.25 end gasket atop the allready 1″ higher block,my carb would hit my Cobra hood even without a air cleaner. Thus the 400 FMX block wound up in the wife’s Bronco.