Then you need to bore the heads. Could be easier to buy 1600 heads
I have 1300, 1500, 1600 heads.
I want to try 1300 or 1500 in 1600 , аnd 1600 to open the cylinder 90.5.(1776cc)
I have three engines , and I have two 1303s.
1-1303s to be a 1600turbo
2-1303s to be a 1776 with 2x36 drla