Okay looking into things a idler to get the pulley spining the right way is the way to go using cvh alternator bracket and Zetec pullied alternator like my current set up, anyway....

Question of the day is will a silver tophead fit a st170 block? I have one heavily worked on I can't seem to find a clear cut answer

So a sliver too head with silvertop cam sprockets on a st170 crank, is the sprocket in the crank the same? If it's different why can't I use the gear off my silvertop engine ?

This would be nice to know !