@sixball More likely this will be moved to off-topic. Will move the power band , might need to richen up , I have ran Vic Ram & H -Strip Dominator intake , Not familiar with Weiand characteristics. In line or Side saddle carb mount ? I have made & used T-P top , but if the Weiand I think it is , not able to do . On one of the set ups I moved the rear carb One inch forward to deal with cowl . Data logger showed No change .
No idea but I'd ***ume you'd have to tweak it a bit since you are lengthening the runner. One thing is for sure I'd sandblast them so they'd match the cast intake better. Weiand tunnel ram risers https://share.google/fCGYIm4j7F6VXymh1
I'm ***uming this 4 inch spacers are going to be between the upper and lower of the intake? Not the carbs !