Do you have a automatic or 4 speed? Rear gear and tire size? Like stated before, You will need a high stall converter and/or steeper rear gears to make a bigger cam work.
Got a A833 with 3.23 rear gears as I live in the country & half my driving is doing 65 mp/h. I know the 3.23's are letting me down. Rear tyres are 255/60/15's.
