Technical Searching for a SBC flywheel experience. Speedmaster brand ????

https://www.speedwaymotors.com/Speedmaster-1-229-011-168-Tooth-Billet-Flywheel-Chevy-350,323449.html

Help please on the flywheel for my 40’s SBC swap.
I’ve tried LuK and Pioneer, but they’re single drilled and tapped for big Pressure plate bolt pattern.
Unfortunately not enough meat to redrill for B&B.
Has anyone had my experience with this Speedmaster brand flywheel?
Carried by Summit, Speedway and Jeg’s.
This brand looks like the only affordable (at least for my wallet) flywheel to fit my SBC.
Here are the specs I need:
Late model ‘90 350, one piece RMS, external balance, 168 tooth, must be drilled for Borg and Beck pressure plate.

Thanks!
Bill

 

Is your SBC internally balanced or externally balanced? Above is for external only.

 

All 168 tooth chevy flywheels early (2 piece seal) or as in your case late(1 pieceseal) are going to be within a few RCH of the exact same diameter as they have to fit the 168 tooth ring gear. If there isn't enough meat (diameter) for the Borg and Beck pressure plate you have you have the wrong pressure plate not the wrong flywheel .

 

All stock 86-up one piece rear main seal small blocks are external balanced, aren't they?

I think he means he wants one drilled with the 10.4" clutch pressure plate bolt pattern, like the 153 tooth flywheel would be?

 

I’m assuming you want the 168 tooth ‘wheel because you already have the starter that has the staggered bolt pattern. In looking at the photo of the f/w in the link you posted it looks as though it is drilled for both an 11” and 10 1/2” Borg & Beck clutch bolt pattern.

 

I already have the 1310 B&B pressure plate with 11-5/8” bolt pattern on early SBC 168 tooth flywheel, with adapter for SBC/early Ford trans.
Engine (283) has a knock, so switching to late model SBC.

Looking for feedback on this particular brand, please.

 

This isn’t an answer to your question but more of a PSA. I purchased a Summit flywheel for the post 86 externally balanced 350 and the engine had a bad vibration which it didn’t have before. I found an OEM unit and all is good. If your having the crank balanced it can be done to your new flywheel but it sounds like your just installing A running engine. That Speedway piece seems nice so maybe a higher quality than the one I got.

 

Always thought that diaphram and B&B were the same pattern. The difference is the diameter, hence the need for 2 set's of hole's.