A 10/10 Crank and rods.. a non-nylon timing chain which has lightly scored the block. Tghe crank kit cane with FM bearings. I read on the crank, "CM 010". You know I was hoping for a virgin engine... SIGH... Now I look at the piston for a part number to see if the block has been bored. I get, "1237454". I see no other number. I continue to clean the piston looking for something and find nothing denoting any machine work to the cylinders. I am still in the process to clean the block and I do see something on the deck, "31".. that's all I can find right now. The deck is gold from the head gasket spray.. I am assuming here. I look at the camshaft part number and it's a GM one, 1246740. I can't find this camshaft anywhere. I am sort of deflated but trying to see how much work has been done to this engine. I don't see any milling on the heads and stock intake. I am still thinking about taking to the shop the get cleaned up and sonic tested since I don't see anything besides a possible rehone and turned bottom end. I don't want to waste time on a dud. I could look for another block and take another gamble or save my pennies for a Tomahawk. (You know I keep weighing with Pros and Cons between cast and Tomhawk because all the machine work and the girdle gets close to the price of a new block. Reading JW's comments rings in my head now and then.) What do you guys think?
if you have the money a tomahawk seems like a no brainer. But if you are like me , you make due with used stuff and put it together best you can with the money you have.
350/455? Finding a virgin engine after 40 years is tough. Other than a turned crank and a timing set and a replacement cam it doesn't sound outta line to be put back into service
A 10/10 crank is no big deal. Jw built a 1000 hp 455 that had 20/20 crank and it was fine on teardown
Yes, the more I think about it, it sounds OK.. I'll take it to the shop soon. But those bearings looked awful
I'm not surprised the bearings look bad. If this block was "rebuilt" by a mass rebuilder, I'm sure they go thru a SOP on ALL engines and give it the "crank has scratches, turn it .010" "timing set is worn, replace it" "put a new cam/lifters in it too" Never mind the oil pump set up, " ahh, ok new gears, gasket, filter cover, ........ ok that's rebuilt"
cutting a crank is done all the time and they go a long way after that. When the crank is offset ground for a 470/482 or larger stroker the journals get smaller too. Measure it, set it up right and it will run fine. Tune it, and don't detonate it, don't think you are gonna spray it with a 300hp kit and will go a long time.
