i have gill set up and emi set ,,,which ones would yall use to run ,,,stroked 496,,550 hp

I would run the ones that look to be in the best condition, assuming they both have the long risers. You won't see any difference in power.

Thanks ,,emi r brand new ,,, and do have the 3 taller and longer riser ..plus emi is abt 15 # lighter ,,

If the EMI riser is 3" taller, they won't line up with your exhaust holes in the transom, if you have standard risers now.

. Thanks for the heads up..also have standard riser too...the taller ones already have a port for Afr sensor plus i have some angle adapters ..helps when u worked for an oilfield company that have welders on hand to make crap for u out of left over stuff..lol

If your running a high lift cam you can redrill the holes, if no high lift cam then standard rise should work

Is just a comp cam 547/547 lift ......