87 swapped swap

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I'm pretty sure the bolt pattern between the block and bell housing is the same for all SBC at least up to 2002.
 
It should. Usually the output-shaft on the engine is different on automatics and manuals. Usually the automatic is shorter to allow for the size of the torque converter, whereas the manual is longer to allow for the pressure plates and throw-out bearings.
Specific sizing on a Vortec motor I couldn't tell you.

Also, sometimes (like on honda motors) automatics use a different Idle Air Control Valve. I can't speak to the specifics of a GM motor though. Seems like something that a GM-forum would have covered quite extensively.

http://www.fullsizechevy.com/forum/...-5-7l-automatic-manual-transmission-swap.html
http://www.ar15.com/archive/topic.html?b=1&f=134&t=1419541
http://www.pacificp.com/forum/viewtopic.php?t=6684&sid=afaa352f6d77d06f6bc4652e54695726

On a casual read through of those forums it looks like its possible to use any motor. Mostly ECU related issues.
 
for simplicity I would not use the ranger or a marks adapter but simply go with a GM V8 (flavor of your choice) a (GM Auto Transmission...4 speed auto or better) (The matching AA adapter) then the FJ60 split transfer case. Done!...proven setup.

I think the modern era of 5.7's can run the auto or manual trans without issue. My 1999 5.7 vortec came from a donor vehicel setup for auto trans. I removed the flex plate, sourced the correct flywheel bolts and flywheel and I'm in business for manual.

I use a manual transmission. In hindsight I would go with a GM 4L60E or 700R depending on year of the engine.

I don't know how the 5.3 and 6.0 GM engines are setup....but I believe most were initially configured for auto transmissions...I know in the very new stuff all you can get is a automatic transmission (GM Trucks)

Modern Autos perform very well, torque converter makes slow climbs easy.... only advantage I see to manaual off road is controlling speed on a downhill slope...or potentially the simplicity of a manual trans or potentially the heavy duty aspect of a manual..depending on what you are talking about.

The fewer adapters you have the better you are..in my view....and while I have a mark's adapter now...I would not go that route again.
 

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