Thanks whynotthinkwhynot !! Yeah my point was to build a motor while I still use my car. I'm currently studying in university, 200 miles away from my father's garage so it's not an option for me to remove the motor, order parts needed for rebuild, wait to receive them, rebuild and then reinstall the motor. I need the car running so a week-end swap seems to be the only option for me. Furthermore, if I needed to send the block to a machine shop it would add time to this ( I personnally wouldnt rebuild an engine with a block that has out-of-round bores or non-flat mating surfaces ). Also there are no svt engines for sale in my area. So buying a zetec bottom-end seems for me to be a good option... But I wasnt sure if stock zetec rods/pistons would clear the svt head valves ??
You're right about not knowing whether the problem is my valves or the rings, I'm going to run a leak down test for sure before I'd buy another engine or bottom end (maybe my problem is only a head gasket ). I was only asking for some infos before I'd run into the process of swapping an engine if I ever find the problem to be the rings ( that and a little bit of curiosity)
So basically you were telling me that it was possible if I am not mistaken ?
Thanks for your reply !!