1968-1969 340 wanted in texas

im looking for either a 340 or 318 block to build up or an already built up one, stock is fine also, my only conditions are that it be in Texas and not blown in such a way it cant be rebuilt i am looking for somthing under 750$ if i can, if there are no 340s or 318s a 360 is also welcome under the same conditions, thanks in advance guys