I have an '88 toyota pickup with a'89 5.0 already in it.  We used an Advanced Adapters kit and its great.  I am trying to put another small block in my '88 4runner, using Toyota Northwest's trani adapter.  I am trying to get around buying the pressure plate that they sell.  Please let me know if anyone has had any luck. Thanks so much.  

i dont know but what kind of clutch are you running  

i dont know but what kind of clutch are you running  

This may be a question for the snowman, somewhere in the late 80s the went to a different bolt pattern, one piece seal and a counterweight on the flywheel.
If you were more like in the late 90s or 2K to present I would be more help with the engines. I went 5 cylinders myself with a 3.5 engine from a hummer H3 family 220HP 220TQ
 

The bolt pattern did not change on crank shaft but clearance for flywheel did. With a automatic is it not a issue but with a stick with one piece seal you need to use a flywheel designed for it. You can use new style flywheel with old seal but not new seal with old flywheel. I might add if it was me I would use a 4.3 as it is a easier fit and weighs less and warms up well and if you use a 94 or later 4.3 it has a internal balancer shaft the smooths out uneven fire 4.3 to be V8 like in smoothness. This is because a V6 needs 60 degree block to be even and 4.5 is a 90 degree 350 block with 2 cylinders looped off.