If you have a scattershield that can be used with either a 130 or 143 tooth flywheel AND you are using a 130, then you need the kit.

HOWEVER, it is really adsvisable that you use the starter snout support regardless as this goes a long way towards saving starter motors. Stock bells have a machined provision to support the starter snout, scattershields don't.

http://www.brewersperformance.com/proddetail.asp?prod=SAC-LW

Aren't all smallblocks 130 tooth? I suspect the smallblock scattershields are specific and are all 130 tooth.