Well im never one to argue cause i know im not always right but i got the block height numbers from LCE themselves and anyone who has worked on an R series motor will agree LCE knows there toyota motors. Maybe they measured from a different spot on the block than wherever you got your numbers from. Who knows. But I just wanted to point out im not just throwing out numbers from off google. Iv done my research and iv worked hands on with these motors for years too. Even though iv never took the time to measure a block lol. Im not by any means saying that what you say is wrong. I have alot of respect for your knowledge, in fact the reason i joined Marlin crawler is so i could ask YOU questions about my weber 38 because iv read alot of your posts and you know what your talking about @79coyotefrg. Now i will admit i do get into a little bit of a fantasy world when it comes to building motors and tend to go over board lol. this guy really could just throw a basic intake and head off a 20r onto the right 22r block and go but where's the fun in that haha.