CLASS RACER FORUM - View Single Post - "Family Tradition" a build for Daughter & Grandchildren

Bill Moulding · 09-05-2021, 02:08 PM

Couple of things I learned on my ls build. If you are using a stock crankshaft be sure to check the thickness of the flange on the back. Some early 4.8 and 6.0 cranks have a thicker flange (1.250) where the majority have a .857. The thicker flange uses a flat flexplate and the others use a dish style. A crank from a FWD car is different again. I used a Hughes 4004X flexplate it has multiple convertor attatchment points.

I used an ATI 917215 balancer which has timing marks and needed to be pinned to the crank. A few companies make a fixture for this but instead because my engine was disassembled I had the machine shop cut another keyway in the snout. Then used ATI 916631 drive mandrel for the vacuum pump and alternator.

Worked for me.

09-05-2021, 02:08 PM	#28
Bill Moulding Junior Member Join Date: Feb 2006 Posts: 58 Likes: 0 Liked 3 Times in 3 Posts	Re: "Family Tradition" a build for Daughter & Grandchildren Couple of things I learned on my ls build. If you are using a stock crankshaft be sure to check the thickness of the flange on the back. Some early 4.8 and 6.0 cranks have a thicker flange (1.250) where the majority have a .857. The thicker flange uses a flat flexplate and the others use a dish style. A crank from a FWD car is different again. I used a Hughes 4004X flexplate it has multiple convertor attatchment points. I used an ATI 917215 balancer which has timing marks and needed to be pinned to the crank. A few companies make a fixture for this but instead because my engine was disassembled I had the machine shop cut another keyway in the snout. Then used ATI 916631 drive mandrel for the vacuum pump and alternator. Worked for me.