We have just purchased one 68 model side oiler block that has had no problems and is .030 over and have another side oiler on the way that is a 65 or 66 block that is only 4.250 bore. these blocks will be available for build ups. They now have 428 cranks in them that are very nice. we can build them as 454 type engines or can install strokers in them. One of the engines has a 391 steel truck crank that has been stroked to 3.980 and uses the Scat 4340 H-beam rods. I can build these to suite your needs and test on the dyno for
oil leaks and performance. Please feel free to e-mail me or give me a call. Thanks, Keith Craft