Please forgive this Newbie.

      This is not so model specific but more for the 2.0 Pinto engine I am planning to build.
   I am in the U.S. so it is an early (70HM) 2.0 block. I took it out of a 72 pinto with a 4 speed. 
   It was running okay but I have no plans to use it as it came. After the rebuild it will be going into 
   a 77 Spitfire with a five speed. It has been some time since I have played with a pinto motor.
   Frankly, I could use some input on pulling some power out of it without sacrificing durability or reliability.
   The bore is already .030" over and will need another boring. How do they deal with being .060" over?
   I would like to see some 150 HP without her being too high strung. I have been considering a longer con-rod,
   Crower 5.2 inch. I am currently lost on piston selection considering the long rod but would like to run premium fuel on 10:1       compression. I am looking at a mild cam. Reasonable power down low for driving on the street up to 6500 rpm. 
  I will be doing some port work but nothing radical. I figured on using larger valves and would like to change port shape 
  to accommodate that. Where might I look for something around a 1.75 inch intake and an appropriate size exhaust valve to    match. Finally, due to space constraints I will be limited a single Weber DCOE 45-48mm on a weber 12-3132 manifold.
  I hope that single carb will allow the flow to get me where I want to be. I had to abandon the dual carb effort due to the 
  #4 intake port being buried in the firewall. Engine placement took precedent over everything else. I have been building
  hot rods a long time but this little roadster has presented me with some unique build challenges. Honey, "what do you mean
  no hood scoop?  I would like to thank everyone for my addition to the forum as well enduring this insanely long rambling
  post. 
   
    

Hi Newbie,
Welcome to the forum.Does Esslinger in California do stuff  for the 2LT version or does he only specialise in the 2.3 version. My brother got a complete roller rocker, cam and head kit for a 2LT as well as underdriven bottom timing pulleys. He is the absolute guru on porting and other mods for Pinto engines. We have to get most of our parts from the UK( Burtons and other specialist suppliers ) or from the States. We only ever had the 2LT one here but can be overbored .60 thou without any dramas. he might be a good source for parts etc. The mods you are suggesting are common, My RS runs 10:1 compression, a mid size cam , has been nicely ported and flowed but I have used a Holley 350 for the carb, which is not that common.  There a few different threads in this forum you can check out for engine mods, as always there are lots of talented members on this forum to give you answers. In this place there are no silly questions, we all like to learn.
Cheers, Len