motown small block street chrysler 426/440 world has taken the fabled 426 hemiŽ and refined it using the latest in cad/cam technology and input from leading mopar racers this block has just about everything an engine builder wants technical specifications material a357-t6 aircraft aluminum optional compacted graphite deck heights 10.725 deck thickness .600 minimum cam bearings standard chrysler main bearings standard chrysler camshaft location stock or raised 250 lifter bores can be spread to .100 and bored between 45 or 48° bore available with 4.250 and 4.500 4.600 in cgi maximum bore 4.625 cgi 4.530 aluminum cylinder wall thickness nominal .200 4.600 bore water jackets expanded for better cooling lubrication priority main oiling system bellhousing machined with both chrysler and gm bolt patterns oil pick-up changed to 2-bolt flange mount relocated for clearance and provision for external oil pick-up crank clearance up to 4.750 crank with external oil pick-up main caps
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