scoobyclassic

Hey guys lookin for some help,My classic 98 started missfire yesterday on the way bacl from the mbo show.It started only when i put the foot down but got worse,pulled into services to check it and could not get it started again,got it going with a push start tho??? Got the car round a mates house and swapped the usual things of his car to check air flow coil plug leads plugs,no change and now im stuck can anyone help plz ???????? cheers