Hey Just an Idea . I was informed that it is easier to buy a new bottom end from subaru. ej 207 and put ur heads if they are all good.. the complete cost is about 4400 with a new oil pump. but its about $2600 for the bottom end.. its easy and cost effective. other wise u are looking at 6 000 plus for an ej 20 to be rebuilt. i hope i have helped .. enjoy