Wrote all that out A couple of days ago, posted it up tonight,
Since then iv replaced the supersprint manifold with with piper 4 into 1 and a full cam racing system
Old vs new
Old "muff diver" back box
Jack under wheel as my bargain halfords huge jack jacks the hole car up about 3 foot front the front jacking point so to be on the safe side whacked the windey jack under the tyer lol
Then i thought id try on a piper 2.5" Outwordly rolled tip back box, wich i think i prefer