Once you port a swirl port head, you eliminate any decent torque curve they had and create a useless hunk of cast iron.. there 50% useless as it is. there out of steam at 4,500 but there torque curve at 1,500-2,500 RPM is great... Your in Ohio. useable Vortechs go for about $125 each gaurenteed at a junkyard. you could use Car-Part.com--Used Auto Parts Market to find a pair. You'd have about $600 into the swap. tune it and you'd have close to your 300hp.