20r block and 22r head

[littlebroii]

does this work i was told when i got the truck that thats what it had in it ill post a pic when i can get one

[79coyotefrg]

it will "work"  but not good.   a 20R head is much more efficient than a 22R head.

a 20R head on a 22R block is where its at.  but your's isnt gonna win any races but should run alright

[kneedownnate]

You were probably told it had a 22r block and 20r head and got it backward, or they told you 20r block and 22r head but meant the opposite.

[littlebroii]

how can i tell what block and what head it is

[crazykooter]

The block will have 22R stamped on the drivers side I believe.  Its on the lower back of block.  The head if it really is a 22r head will have a diff carb then a 20r intake would.  The 20r carbs are round.  If its a hybrid(20r head on 22r block) then the intake will look much diff as well.  You can Google 22r hybrid and see pics of it. 
If you really do have a 20r block and 22r head then I would swap the head back to a 20r.  I well built 20r engine revs well and has plenty of power. Just not as much torque as a 22r.