If it's a factory built replacement short block,then it likely has the factory hyd.flat tappet truck [door prop] cam in there.If this engine is destined for your 59 pickup,I'd suggest a set of 817 heads,and an aftermarket cam,such as Show Cars 0950,and either a 340 horse 409 intake,or better yet,an Edelbrock small port single carb Performer RPM intake,and a Speed Demon 625 cfm carb.