ive had this conversion done, and although the results were brilliant, i wouldnt do an engine conversion ever again
i spent a lot on the engine before it went in, silicone hoses, chrome bits, balancing, etc etc
sadly i had an accident in it and the car was wrote off, insurance offered me £800!, it took 6 months to sort out, EVERYTHING was declared and they had receipts for everything, finally had to contact the MD before it went to the ombudsman and i got £2100 IIRC, still not enough but after all the stress i accepted it
basically, buy the car with the engine already in it !