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60-66 Nut · 11-19-2008, 10:38 AM

I think most all small blocks were drilled for the 168 tooth staggered bolt starter. The 153 tooth starter has two bolts in line with each other. There were a couple of engines that were not drilled for the 153 tooth starter, some of the small block 400's and maybe some of the truck 350's. As I recall the 327 was drilled for both. The aftermarket gear reduction starters may bolt up different, I'm not too familiar with them.

60-66 Nut

11-19-2008, 10:38 AM	#7
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	Re: 66 gmc c10 transmission swap to sm465 I think most all small blocks were drilled for the 168 tooth staggered bolt starter. The 153 tooth starter has two bolts in line with each other. There were a couple of engines that were not drilled for the 153 tooth starter, some of the small block 400's and maybe some of the truck 350's. As I recall the 327 was drilled for both. The aftermarket gear reduction starters may bolt up different, I'm not too familiar with them. 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500