Quote:
Originally Posted by mattallac
I would put the 5 speed in and get rid of the auto , the last post is exactly right in the split years . the FA
(This should be SA) manual will fit in the stock tunnel hole and the FB needs to be shortened 103mm .If the twin dizzy is stuck the first gen motor is a better fit .I have 2 73 rx2s and it can pose as a problem ,you need to play with the rx2 and rx7 motor mounts as they are different in the motor set back .Trans mounts are easy to make so that might be a must ,also check your pinion angle (stock) and see what the difference is with the rx7 stuff . you want the angles to match so you don't pre maturely wear your drive shaft bearings.A ll the rx2 to rx7 mods are a pain in the ass but the rx7 stuff is better for the horse power (more solid ) .Even the threads on the brake lines is different . Time and cation is the biggest part of the build .
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The tranny that he is talking about being a more direct fit is the 79-80 Rx7 one or any pre rx7 manual tranny from 74-78. both posters got their info right. You can change the bell housing on your automatic which will allow it(your tranny and the later engine) to work, it is just a little more effort, it would take the later flexplate and later starter. One thing not mentioned in any of this. You will have to modifiy the transmission tunnel to use a bottom mount starter. This modification is typically done with a sledge hammer because there is no inset for the starter to fit into. Also not mention but will need to be done is the oil pan from your engine must be swapped over to the rx7 one.
there are lots of little ankle biters that can get you on this swap but it has been done frequently with good results, just take you time and think it through