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I am currently rebuilding a 327 engine and plan to go with a 700R instead of the th350 it currently has. Can I install that transmission from below once the engine is in or is that something that needs to go together first and drop in as one unit? I only ask because of how difficult it was removing the 350 top bell housing bolts from underneath. I ended up removing the intake for another reason and loosen the top bellhousing bolts from the top.
 

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It can be done. Trans jack helps considerably. But if you have the engine out, its much easier to install eng & trans as a unit.
 

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I am currently rebuilding a 327 engine and plan to go with a 700R instead of the th350 it currently has. Can I install that transmission from below once the engine is in or is that something that needs to go together first and drop in as one unit? I only ask because of how difficult it was removing the 350 top bell housing bolts from underneath. I ended up removing the intake for another reason and loosen the top bellhousing bolts from the top.
i can't help on the install but i do have a 327 an a 700r4 in my 66. for a rear gear i run a 3.55 posi. sure is easy on the rpm's on the highway as 70 mph = 2200 rpm's.
this might be of interest to you........... Gearing Calculator | RPM and Tire Diameter to km/h - mph with Shift Tracer (blocklayer.com)
 

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If you can bench press 100+ pounds and hold for an indefinite amount of time and repeat as necessary:mad:, install separately, otherwise ALWAYS install engine and trans as an assembly. Esp automatics!
Good luck!
 

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The only way I'd try at my age is if it was on a lift. I have done several from the ground in my younger days but that is over.
 
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