pills wrote:Wow, so much misinformation about the supra in this thread!
The headgasket is not that big of an issue, the stock one tends to blow after 100k miles if its not modified. However, you do not need a metal headgasket. They are better of course, but not must have part. A new headgasket from toyota with some ARP bolts with hold plenty of horsepower.
Not true. They blow all the time over 7-75k miles. Improper torque specs from Toyota are to thank. The MK3 BHG is something that has to be corrected before it's a reliable hp car. Of course you don't need a metal headgasket. But if you're going to fix it, why not have it deck/planed and a metal HG? Better to do it correctly the first time than to redo the work and redo the $$.
Also, you'll want to make sure that you get the MKIII with the turbo. From my pal projectsupramk3 over at automotiveforums.com
"Anyone who tells you this swap is a waste should be beaten, it was a waste to make a n/a Supra. The swap is very simple, everything is bolt-in, think about it, same car, same engine, must be bolt-in. Differances between the 7m-gte and 7m-ge are that the GTE has oil squirters, a turbo oil return in the block, intake cam is different (pre 87-88), low comp pistons, ECU, wiring harness, PS reserviour, intake manifold, extra knock sensor, coil pack, CPS, and of coarse the turbo, exhaust, and IC with piping. Also the manual trans is different turbo/na, turbo is the R-154 which is very beefy, n/a has the W-58, driveshaft is different between the auto, n/a manual, and turbo manual. Rear differential is different between the years and models regardless of manual/auto trans, all n/a's got a 4.3 (sport packages got a 4.3 LSD), 87-88 turbo's got a 3.909 LSD, 89-92 turbo's got a 3.73 LSD."
He's endless in his knowledge of the MK3.