One piece rear main seal flywheels

[Truckedup]

So my 81 El Camino project is moving along.I coverted it from auto to manual transmission and it's time for a flywheel and clutch.The engine is a 1990 305 one piece rear main seal,normally set up for a 153 tooth starter motor.
I'm using an early 80's Camaro clutch housing with the down angled release arm.
I checked out a stock new flywheel,the thing was pretty light,about 18 pounds.Is this what they use on later small blocks,a light flywheel? It always seems a 30 pound wheel was proper for street use.
And it looks like it take a different clutch bolt pattern than the typical for ever been the same bolt pattern.

 

[85 Cutlass Brougham]

THere were two flywheels used in the 80's on Camaros. The one you reference is the lightweight one used on some performance models like the L69 305 HO. I see no issue with running one so long as it is neutral balance and made for a 1 piece seal flange. If anything, it will help performance by reducing the reciprocating mass of the engine by 12 lbs! Having driven Camaros with this flywheel, I see no downside. I am planning on one with my 350 when I do the T-5 conversion. BTW, how much do they want for those flywheels new?

 

[Truckedup]

Thanks for the reply. The Flywheel I bought is made by Daikin,a manufacturer of OEM flywheels for most auto manufacturers according to them.It cost about 80 bucks.GM performance offers two of these same flywheels,a 16 pound and a 24 pound for 250 bucks through GM Direct or Summit or Jegs.
The one piece seal flywheels aren't neutral balanced,they have a small external weight.This is to make up for the lack of the pork chop weight on the end of the older 2 piece flywheel crankshaft that the newer cranks don't have.
It also looks like it uses a different pressure plate design than the older style flywheels.