could i have my 351 w rebuilt for under 3,000

it depends on what you want out if it. I can make that $3k go byebye fast.

Build it yourself and save your extra money.

its not as hard as you think. just get a book and go for it.

It is very easy, it can be done, especially with help from everyone on here. It is good to find someone nearby though that has some experience for your first time so you don't screw some little things up.

Just FYI, a local machine shop here in the Detroit metro area will do a stock rebuild of a long block for $1000 sbf/sbc. That's you drop it off and pick it up about a week later ready to go. Cleaned up painted, machine work done, new rings bearings, timing set, cam lifters, oil pump, gaskets, valve job, assembled, painted and ready to install.

If you want balancing done, of course that's extra.

Just a price point for reference for you.