Take Mex #180 until Guiterrez Zamora north of Nautla. PM me and I will send you a ride guide for the rest.
It will have routing and photos and it also can connect via Puebla. Some of the best riding in Mexico is along the Teziutlan Massif route that bisects the Trans- Mexican volcanic axis and runs fron Teziutlan, Puebla to Tehuipango, Veracruz. I live in Veracruz and I can tell you that most gringos don't know this route, the few that do really like it.