When i had my last escort 2l i had a heavily ported with wild cam head prepared. I was going 2 have 350Chev valves put in and it was going 2 cost around $250 from Gully Engineering in TTG Adelaide. However, there was a huge pit fall!!! at the same time my head work was being done there was another rs2000 having very similar work done except less porting and a lesser cam grind, except this bloke put 350Chev valves in. They fitted nicely, made the car ABSOLTELY FLOG compared 2 b4 the valves went in. After 4 months of driving the car began having problems, the head was removed and it was found that the head was cracked in almost every guide due 2 removing 2 much meat from the head!
It was very expensive 2 repair!
I decided against the mod myself and just got a three angle valve job done, much more reliable