this is what i spent on my ls/vtec from just having an ls swap

650$ jdm b16 swap for head and tranny 30k miles AWESOME ASS SHAPE sold block for 100$ so total is 550$ here

550$

250$ act clutch

800$ total

i spent 500$ on machine shop work but 300$ of it was from my head gettin all new parts. so your lookin at 200$ at least

1000$ total or more
gunnabe about 200$ for a decent shape LS block

1200$

then u have to rebuild it.
pistons/rings 300$
bearings 200$
head bolts/rod bolts 150$
oil pump/water pump 250$
head gasket and other gaskets about 100-150$
ls/vtec oil line and fitting 25$
axles and midshaft if u need them to 200+ at least

this is not even all the money i spent on after market parts either and i know i left some shit out and i got 20% off at hondaland and i get bomb deals on b16 motors so your lookin at spending at least 2500 or more.