Hello Sibbat !
This is the way most racers correct the blocks around here. BHJ makes some of the best correction fixtures around. The nice thing about having one of these fixtures, is you can do a few blocks for others and soon it will have paid for it's self.
Dowel-Tru Blueprinting Fixture: BHJ Products, +1 (510)797-6780
Blueprinting Fixtures
Dowel-Tru Kit
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Part Nos:
DTK-CH, Chevrolet
DTK-FOB, B. B. Ford
DTK-FOS, S. B. Ford
DTK-MPB, B. B. Mopar
DTK-MPS, S. B. Mopar
Use of the Dowel-Tru requires the 2-Inch Precision Support Bar and Main Bearing Bore Adapter Rings which are purchased separately.
Most high-performance engine builders have experienced the time-consuming operation of "dialing in" bellhousings using troublesome offset dowels. Use of the Dowel-Tru will quickly and easily correct bellhousing dowel hole locations by placing them in the proper relationship to the crankshaft centerline.
The Dowel-Tru plate installs on the block using the 2-Inch Precision Support Bar and Main Bearing Bore Adapter Rings (sold separately). Once installed, it is adjusted into place using a pair of jackscrews and then bolted to the block. The dowel hole locations are remachined with a special size reamer from the kit, guided by drill bushings in the fixture plate. After machining, special stepped dowels are driven into place.
The Dowel-Tru is available to fit most popular GM, Ford and Mopar blocks and includes a manufacture specific plate, six stepped dowels and one special reamer.
Additional Stepped Dowels are available in six packs. We offer standard length and special extra long length for use with a motor plate.
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Regards Brian