I am trying to find out if I could use the 20r head on a 85 lazer block and what kind of modifications would need to be done. I have 2 of these motors and plenty of 20r heads. I also have the headers for the 20r. I race on a 1/4 aslphalt circle track and would like to hear from anyone that could help me with this. I currently have a 22r block with the 20r head combo and I don't feel that I'm getting enough power out of it asgainst the Eslinger ford motors