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Before you get that "Search Newbie" pic ready, here is what I searched. "22R 22RE" "Knock Sensor" "22R 22RE Block" "22R Fuel Injection" "22R Fuel Swap" "1984 22R 1985 22RE" "FAQ's sticky" . . . pages, upon pages of info reaching back to 2001. . .
Second, my reading comprehension skills are poor . . . here we go.
Two 4Runners: I have a '85 22RE with a hole in the side of the block. I have a running '84 (built 6/84) with 22R. Some info in the posts state that the later '84 22R blocks will accept the EFI from the 22RE.
However, I did not read anything that said WHEN is the cutoff for early/late 22R's.
So, without changing pistons but drilling block for knock sensor, is putting the '84 22R block in the '85 truck and using the '85 EFI and wiring a direct swap? Or will pistons have to be changed from dome to flat? If pistons have to be changed, in theory, wouldn't the costs be the same just to find a 22RE short block?
Thanks in advance
Flame On! 
Second, my reading comprehension skills are poor . . . here we go.
Two 4Runners: I have a '85 22RE with a hole in the side of the block. I have a running '84 (built 6/84) with 22R. Some info in the posts state that the later '84 22R blocks will accept the EFI from the 22RE.
However, I did not read anything that said WHEN is the cutoff for early/late 22R's.
So, without changing pistons but drilling block for knock sensor, is putting the '84 22R block in the '85 truck and using the '85 EFI and wiring a direct swap? Or will pistons have to be changed from dome to flat? If pistons have to be changed, in theory, wouldn't the costs be the same just to find a 22RE short block?
Thanks in advance