I am soon going to be getting my donor car a ford sierra 2 litre pinto what sump mods have to be done and who's the best to go to as I'm not a welder, the chassis I am going to be using is a MK indy.

Have fitted a Pinto in a 'book' chassis and mounted as low as poss. If you look at the sump on an 1800 it is only fractionally below the bell housing so there's not much mileage in altering it! Mount the engine as high as possible and as far backwards as you can get it, modify the tunnel if necessary.