Walbro Woes!!!!!!!!!!!!!!

[Magoo]

HEEEEEEEEEEELP!!!!!

Just spent 2 shitty days putting a Walbro Fuel pump on.

Done all the first stages of tune from the upgrade thread.

Volvo T5 intercooler
remove and blank safety valve
K&N filter
boost gauge

took the car out before getting the Walbro and it was fine

fitted the Walbro and it sat a little high in the cradle, took it for a spin and it was kangerooing all over ( was low on petrol though) put some more juice in and it was the same.

Took the Walbro back out (in the process rounding one of the 6 bolts that holds the 6 cradle in, which I then Had to drill and it still won't take another bolt, just keeps spinning so its only held in with 5 bolts which I think should be ok????)

Fitted a longer pipe to make the pump sit lower in the tank bolted everything back up and took it for another spin expecting it to be fine.

WRONG!!! its still running like a bag of shit.
when pulling off it is trying to die, and when driving steady and then putting your foot down it does the same. but if you floor it and the revs are high it is fine.

Has anyone any ideas??????????????