I have a 350 4spd muncie with a 168 flywheel and 11 inch clutch. Would there be any advantage in using 153 flywheel and 10.5 clutch. If so what are all the parts I would need to switch. Thanks L.Garner

If given the choice, use the larger flywheel which allows for the larger, 11 inch clutch disk, which has more surface area, more gripping power. That's why first gen big blocks and SS-350's used the larger set up. Most 14 inch flywheels (the 168 tooth) will have holes tapped for either the small or large pressure plate, but the smaller flywheel limits you to the smaller (10.5 inch) disc/pressure plate.

If you change flywheels, you also have to change the; starter, starter bracket, bellhousing, flywheel cover, etc.

If there is an advantage to the smaller set up, I've never heard it.

About the only advantage to the little flywheel is that GM made them in nodular-iron and lightweight for use on some engines. You might check into it if you want to. pdq67

I used the 153 nodular iron 13lb flywheel from GM Performance parts on my ZZ430/Richmond 6 speed with 373's.
I could get away with it because of the low 1st gear.
I'm using the CenterForce dual friction 10.4 inch clutch.
The advantage is: Quicker Acceleration!

------------------
Don~ ZZ430DropTop (http://hometown.aol.com/zz430droptop67rs) Pro-Touring.com DropTop (http://pro-touring.com/featured_cars/Camaro/Don%20Seefeldt%2067%20Camaro/don_seefeldt.htm)
67 RS/SS Convertible, 70 RS/Z28

i would think a larger flywheel would give the starter more leverage to crank the engine, and would be better for a high compression engine that cranks hard...but the smaller flywheel would spin it faster.i personally have a 153 tooth flywheel on my nova with a corvette LT4 starter, and have no problems. i also think the smaller flywheel would provide a little more clearance for headers(by moving the starter in), if that is an issue.otherwise, it is just a personal choice, or, as usually happens when i put a car together, depends on what you have laying around.

------------------
1971 Nova(looks like 69 camaro from underneath!)
355sb, vortec heads, HOT cam,T-10 tranny, 3.70 gears 16" IROC wheels

Ok my question to swapping the flywheels that I haven't seen mentioned yet.

To swap go to the smaller flywheel don't you have to change starters? As I remember from swapping in an engine to a 63 Impala, I ran into the problem that the block wasn't drilled for both the parallel and the staggered bolt starters.

This might be a concern. I think I was told that after 82 or so engines weren't drilled for both anymore.

I know you all probably already know this, but it threw me and my dad for a loop. And he has been doing this for 40 years.

Thanks for your time.

A 153 tooth flywheel uses a starter with the bolts aligned on one side. A 168 tooth flywheel uses a starter with the bolts offset.