Kits usually come balanced for an automatic. You can buy a light weight flywheel that is counterbalanced for a 400 which is what a 383 is essentially. Or an engine shop that balances engines can help you if you want to use a standard flywheel. The 383 can be balanced internally but is expensive because the mallory metal that they use is expensive. Nov 08, 2002 · Space consideration ..ie the JTR conversion requires 7.25" or smaller harmonic balancer to clear the steering rack...aftermarket balacers for external balanced engines as the technology expanded can be purchased in smaller diameters than 8 inch.My internal balanced 73 SBC 350 has a 6 3/4 " OEM balancer. 383 stroker cranks can now be purchased as internal balanced models where you can use the ...

Mar 07, 2017 · Some of most frequently asked questions we get on our engines are ... which harmonic balancer do I need for my crate engine? And how do I install the harmonic balancer? Lucky for us, our friend ... Shop our collection of engine rotating assemblies & components from Ford, Chevy 350, 383, big & small block & more. Free shipping on orders over $100!