I was referred here off the HAMB, by a member here and would like to pose some questions to you all.  Motor is going in my 49' Ford, and I have 3 Y's to start.  I have a 272 I want to use for mock up and as initial runner.  Then I got a deal on a 312 block and crank, a factory dual 4's aluminum manifold with Holley 4000 teapots, a big as isky cam that was ground for kens and leslies, that I wont use (to big I think for the street).  All the misc. oil pumps etc.  2 of the motors were complete the 312 was not.  So....... Do I build that 312, or do I find a 292 and have the crank turned down and build that.  Two of the head sets I got were the larger 1.92 valve heads one set is an ECZ-G heads.  I want decent horsepower, looking around 300 if it can be reliable, cause I know I'll beat on it.  I'd like to say money is no issue, but it is, but I wont skimp if thats what I need.  Hell I got a 46' knuckle motor that I have 4k into and still have a little to go, and still wont have any serious horsepower.  So if I gotta sell a kid I will.  Can I get some input and advice.  PS, I am new to these motors (cars) and fell in love with the Y-block, sound, looks, all of it.  So lay it on me, still searching around the site, but would really like a little interaction with members.  Thanks.