I bought an 86 Corolla fastback for $200 today. It isn't the GTS, but I got a 4AG engine out of an MR2 along with the wiring harness and computer, all for $200, including the car.
Hope you know there is alot more to the Swap then what you just Mentioned.....The SR-5 AE86 might as well be a different car.
Here are the listing for the differences in parts pertaining to the engine swapping. So you can decide if you want to go through with it........
4A-GE engine (and all brackets to support peripheral equipment)
Most peripherals such as A/C, P/S pumps and compressors
Complete intake and exhaust runners and headers
Fuel pump and lines
Gasoline tank, evaporation and related items
Clutch fork and fluid line locations and bell housing (GTS and SR5 has opposite side clutch fork and slave due to the differences in the exhaust runner location and is extremely important not to run fluid lines next to exhaust systems)
Transmission is the same unit as the GTS (T50C), however the speedometer gear is different, and must be replaced to read correct speed on the cluster. (due to different final drive ratio)
EFI computer triggers and sensors
AFM or MAP
Air Temp Sensor (MAP only)
distributor assembly (MAP and AFM based are different)
Igniter and Coils (different for AFM and MAP based)
EFI Computer (MAP or AFM specific)
House Harness and Engine Harness and related junction boxes
All relays and VSV triggers
peripheral VSV triggers
Battery terminals and fusible link terminals and fuse box
some of these can be ignored for carburetor use such as Weber Side-draft carburetors
Ignition system
Dash Cluster missing check engine (W) lamp
Labor and Installation Professional who can proceed properly so as not to create more problems (cheap or un-skilled installer would render the 4A-GE less powerful and unbelievably unreliable.
Oil cooler, block and lines
Clutch and flywheel
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Now as for other items that are mechanically different from the GT-S (4A-GE equipped models):
Differential carrier
Differential gear, axles, hub assembly (need 4A-GE unit to utilize commonly available LSD)
Rear disk brakes vs. drum and related lines and cables (except Japanese GT)
Steering rack, knuckles, tie rods
Propeller shaft
Clutch fork, assembly, cables, lines, bell housing (as mentioned above)
Front and rear suspension are different from factory in spec but can be interchanged (Not significant as most owners replace them with aftermarket systems anyway)
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Body and trim differences: (Not really needed but why not list it)
Seats, panels and trim
Outside mirrors (some were equipped with power as on the GTS, while others were fixed manual units)
Tags and Emblems (obviously...)
Front bumper lower spoiler
Fender protector on 86-87 models
Trunk moldings on 86-87 2 door coupes
Rear spoiler missing on 84-85 SR5 3 door hatchbacks
Color variations inside and outside
Body side moldings
Number of spot welding in key frame members on 86-87 models
ETS Cassette Radio player (Ok, not important at all)
Rear Wipers, Power Windows, Sunroof only optional on GTS
Auto Climate Control (Japan Only)
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Congrats on your Cheap Find tho.......One heck of a Deal if you ask me.......Here is a good website for the swap so you wont get lost on the way....
http://www.geocities.com/project_post/
Pretty much a step by step documentation on all the you will need to do. Also check out
www.club4AG.com
I owned a '86 SR-5 AE86 Hatchback.....Had a Silvertop 20V to drop into it and made some priority changes and bought my Truck and sold the AE86.......They are fun cars but A LOT of work on a Constant basis.....
Good Luck!
Mike
'88 CRX "Track *****"
'99 S-10 Xtreme