I ran a 62/70 with 190's and stock injectors, and honestly, I liked the turbo better with the stock injectors. I did have a tuned FICM which helped some, but lag wasn't a real issue with stock injectors or the 190's. It was more a lack of air up top that I didn't like when running the 190's.
I did tow with the 62/70 and 190's, and absolutly hated it! Had to keep the RPM's up to keep the turbo spooled or else it would bog down and get real hot. Towing with the 62/70 and stock injectors, I had to really push it to get the EGT's over 1,000*
-French