"LA" engine?

All true and I'll tell you something else. The 4" stroke small block crank will fit right in the Poly motor. IMO, their heads are superior to LA heads when ported and fixed up. They can be made into real torque monsters.

Also, the blocks are almost indistinguishable from the LA small block at a glance. They are basically the same identical size.


toolmanmike said
Don't mean to ruffle feathers.


Similarities Between Poly "A" engines and LA engines

Poly "A" blocks can be used with newer LA and Magnum heads.
Transmission bellhousing bolt pattern is the same.
Crankshafts interchange with 273/318 and internally balanced 340 LA engines.
Oil pump and distributor drive shafts are the same.
Oil pans from 273/318/340 LA engines will fit
Dampers from 273/318 and internally balanced 340 LA engines will fit.
Distributors from all LA engines will fit.
Poly timing chain and sprockets are the same as LA engines.
Poly block deck height, bore spacing and 59 degree lifter angle are the same as LA blocks.
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