Which of these engine would be a better buy?!?

[1TRIKGT]

Whats up guys? I need some help withen the next hour if possible. Im looking at two possible engines to replace my tired 173,000 mile 5.0... One is this

FORD 351W BARE BLOCK CASTING # D4AE-6015-AA-14 DATE CODE (7A9) BLOCK HAS BEEN CLEANED MAG'ED, MAIN CAPS CHECKED,BORE AND FINISHED HONE TO .030 OVER. CAM BEARING INSTALLED. FREEZE PLUGS. READY TO BUILD

the engine looks good in the pictures but what would something like this be worth... I would probally be able to get it for around $300-350 but keep in mind that I would have to pay for freight shipping and it still needs to be built

or this

a 306 with about 5k miles running in my car now. Flat top pistons, arp rod bolts and .510 lift cam.
I am selling it with the oil pump and pan and pushrods for $700

 

[BlackVert]

dang the 351 would kick azz but it would cost a whole lot more. can you afford like 4 grand?

 

[BlackVert]

check with pokageek too he has a motor he is selling

*edit* i bet that is pokes motor lol

and i'll have a 331 ready probably sometime this summer

 

[1TRIKGT]

yea the 306 is his, Im about to go call him now to talk about it. I need to stay on a budget and think the 351 will be too much for now