Well here we go again, Please don laugh but Ive gone and made another cockup. tried to do it in my dinner break should have took my time. Getting really sick now cant seem to do anything right

Right, undid outlet and turned over, no fuel pumping out, took spacer back off and replaced without did same with outlet off and hey presto pumping fuel up.
Put everything back together started up and fuel ****ing out top of bleed screw, had a good look and the filter housing threads were goosed, local breakers just down the road so got second hand housing put it on reconnected all pipes, started up and running perfect, no leaks anywhere. Thanks to everyone for help and advice, could not have done it without yous.
Now for the Cockup,

the 2 bolts I ordered that bolt lift pump to block were still longer then the originals, got one so far in then stared screwing the right hand one in, but it started to strip the threads inside the block, took them both out, and put the original ones back in, left hand went right up tight, right hand where it started to strip did finally go all the way but I'm sure it is just spinning, i.e. stripped inside. did not want to turn it anymore incase I popped out.
Now the pump seems to be on very tight, cant move It by hand seems solid, question is if the right hand nut is just spinning will the one tight nut be good enough to hold it without it moving about or leaking???. I have been out and about in it tonight and checked every time I stopped and no signs of any oil seeping out, like I say when I try movement by hand it is very solid and tight.??