What Size Push Rods

Figured out the problem i was having was my cam.

Put a flat tappet cam in now i have to convert it over to roller.

if i use this cam

COMP Cams CL35-328-8 - COMP Cams Xtreme Energy Cam and Lifter Kits - Overview - SummitRacing.com

and some 1.7 rockers

What size push rods will i need.

the reason it was my cam was because it changed my firing order an caused the computer to still use the stock order.

The entire block is flat tappet an not roller, i was going to convert it back to get a roller cam with the right timing order.

But i just found this cam

Comp Cams 35-330-3 Comp Cams 'Magnum' Hydraulic Flat Tappet Camshafts

its a flat tappet and its the correct timing i need