this is the starter bolt hole that usually cracks. or gets stripped.
I highly recomend you remove the engine and put it on a engine stand
so you can repair the hole and threads properly.
Inspect the boss to see if it is cracked at all.
If it is c racked It will need to be welded.
if it is not cracked it the hole can be drilled and tapped for a
heli coil insert... then installing a stud with the proper shaft shoulder
knerling ( just like a GM starter bolt) can be used. or the correct starter motor bolts. Make sure the Mid plate engine plate does not interfer with the starter motor mounting on the engine correctly.
Install the GM rear starter end brace or ( mini starter) fabricate your own as required. Failure to support the starter at 3 points will result in that hole strippin out again or worse the boss cracking off completely.
I been thru this. You cannot repair that hole while working with the car on a hoist or working under the car.
REMOVE the engine and fix it right. Do not try to heli coil it if its cracked already.
look close. If you cannot do basic fabrication to fabricate a custom made mini starter motor end support bracket similar to the factory GM bracket pay some one who can to do it. ( you risk destroying the engine block)
If you cannot proerly redrill and tap correctly for the heli coil take the block to a machine shop. It has to be drilled and tapped straight with teh right drill and tap for the heli coil Get all new starter bolts. Get a new starter motor if the nose or drive is damaged at all. Make sure the starter motor is mounted right and the drive engages the flywheel perfectly. You need a new flywheel now anyways so yank the motor out and do it right. You will only need to do it once. If you do it right.
if you have to go the old style starter mounting route
The old style SBC starter mounting style uses the old style 1956 starter motor
may or may not match up to your flywheel. May have to create your own custom plate to get teh 1956 style starter motor mounted in the rightr positon to engage your BBC flywheel. A custom made mid mount engine plate is a possibility. AGain the end of that starter must be supported by a brace jsut lie the GM starter is. Find the threaded hole in the side of the engine block where it mounts to. The OEM GM BBC starter motor brce is a starting point to fabricate your own for a mini starter end support.
2 starter bolts are not enough. Some of the BBC truck starters use 3 starter bolts ( a three bolt starter nose) and the end support bracket to keep the GM starer motor from twisting on the bolts.
That flywheel is history.. replace... Its possible the mid plate was interfeering with correct starter motor mounting
The lack of a end brace always results in what you got. Mini starter or not.,
Posting jpg pictures. I resized your pic using infranview. to "desktop size" and increased the JPG compression.
its now 1/4 the file size and loads 5 times faster and is just as clear. Big pictures are a pain for any one on dial up or who $$$$pays for data$$$$.
Please resize and re save you pics at a lower say 50% jpep compression. before posting online
Looks like those transmission lines need attention too. The rubber hose will fail. replace with hard line. Its not that hard to do.
Now that you'll be yanking the motor out now anyways......
Last edited by F-BIRD'88; 10-21-2012 at 09:26 PM.