Need help with int. 31'1974 drainage system

[Nando]

Hi does anyone have a diagram of a 1974 31 foot international sovereign
center bath. I took out the rear drivers side vent pipe and capped it and covered it with the new floor. I might have made a mistake...but what I want to make sure of is will the other vent still work that goes up the wall from the toilet or can I vent another way. Do I need 2 vents? Will one vent be ok in the rear? I need the floor space and the vent was in the way. I am only using the bathroom sink and toilet, maybe the shower... the kitchen sink is not used anymore.
Thank you,