318 with a new 4” crankshaft.

hwy2 said

After previous posts here I am going to get a new 4” stroke eagle crankshaft new pistons and rods to match. What else should I look out for. Will the new crankshaft require balancing. Im going with the .040 over pistons to get 11:1 compression to make it a 392. Any advice will be appreciated.
KB hyper pistons
Speedmaster heads
Hyd Roller Thumper camshaft .514 int
Air gap dual plane manifold
Pertronixs 3 ignition and distributor
Holly 750 single pump
These are parts going back on
Stock rockers

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Absolutely, the rotating assembly needs to balanced, with the balancer, which you should get new. Take the flex plate (also new), rod bearings, wrist pins, locks and rings for the balancer too.

I’d recommend a new set of rockers (PRW work I think?), and you may have to get a correction kit from B3 for good geometry…check first of course.

Get the heads checked…probably need a valve job and have the guides honed proper. May need the heads surfaced.

Read the ring gap instructions for the hyper pistons, they like the top ring to have some decent gap.

That cam will want some converter. As such, might as well go single plane unless you already have the dual plane.