Ok, i know these 360-1 heads are made for 360cid (4.00")bore to->???, but like you say, desinged for 2.1" intake valve. That x-block what i use is brand new, newer used, purchased late 80, early 90's. Block is measured by machinist and he tell me that 4.03" is biggest bore what i can use. There is .070" left in non thrust face side.
I purchased custom piston from ross and and pistons are made for 2.1" intake and 1.625"exhaust, valve reliefs are 2.200"&1.75". I'm asking because there is 360-1 245cnc heads for sale on this forum.
So, opinions??anyone??can i go with these heads, and are they too big for me?