Crate Motor Suggestions

[Walt227]

Hi everyone---thanks for having me! I recently purchased a '72 C10 and after chasing down an oil leak I discovered the PLASTIC timing gear was shredding and that my "freshly rebuilt" 350 wasn't so fresh. I've been looking at the GM 350 290HP from Jegs. I also drooled a little over 400/400 from Year One, but I don't know if my wallet can suffer a 3k dent at the moment, although I'd like a built motor (at least a good start towards one). Any advice wold be greatly appreciated---here's what I plan to reuse:

-Quadrajet
-Intake
-MSD Ignition
-Headers

Thanks in advance!

Oh, and my 200-4R needs a rebuild as well...