2.5 inch or 3 inch

No doubt! Post the build and it's known power leves if possible.
Well I Would Estimate HP At Around 500-550. Bored 30 Thou Trw Pistons Eddy ,Racer Brown Cam, 6 Pack Rods All Balanced, So On So On. It Is Street Only But You Know I'll Have To Hammer On It Some Too. Oh Yea 830 DP Holley With Annular Spray. Electric Fuel Pump With 3/8 Fuel Line, Any Thing Else You Need Too Know.