A stock block, with stock rods and stock pistons, using new wear and tear items that you would have to replace on your old engine. Mate this to a good second hand head after changing the valve stem seals. There is NO NEED atall to use anything other than a standard head. Fit the head to the block using a head spacer of course. You only need to concider steel rods when you make over 500lbft of torque With money being tight, I'd bet that you can get 6 conrods cryo/peen treated for less than the cost of 1 steel rod! Out of curiousity what make rods did you have?