Time to build the motor

Well I was planning on running the 318 through the summer but it is now puking about a quart every 50 miles on the expressway so my new motor plans are off to the races. I currently have a 340 block bored 30 over with the freeze plugs and cam bearings installed. I also have a nice set of stock rebuilt X heads I got from Outrageously Vintage this winter (in my bedroom...understanding wife). Can't have them rust!
As it stands right now its a 1968 Barracuda Fastback Formula S that has a 727 and a 3.23 gear. I don't plan on changing the gear until next year. At that time I may go to a 3.91. I only have about $3000 to spend right now and am trying to decide which way to go. I see Mancini Racing has a 340 stroker kit for about $1350 on up to their balanced, forged crank kit at just over $2000. I have also added up a cast 4.0" crank, rods and pistons and I seem to end up with a much lower number. Does anybody have any advice on what works for a car that will be rarely raced, and used for occational smokey burnouts to help relieve stress. Much better than aspirin.

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