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The crank was checked and grinded 0.010 , they did not use any balancer on the crank, why i dont know but i will get one, what do you think about these parts

1. 440 -73 motorhome block that i have
2. Crank , will any of these brands do the job, eagle scat or k1
3. Rods same brand with 0.99 pins
4. Pistons 8.5:1 ross je venolia or wiseco
5. Aluminium or steel main caps and does they need to be cross bolted, will aluminium caps make the block last longer and what is best for street driving.
6. Does it need a girdle

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Suggestions to your questions (BUT DO research BEFORE you DECIDE!):

Q#1 - OK, but have it inspected and machined , if needed.

Q#2 - Aftermarket, yes, maybe better deal with a COMPLETE rotating assembly. Your choice of manufacturer.

Q#3 and #4 OK, but again your choice after reseach.

Q#5 - Steel, you'll want strength. If you are looking for "crossbolted caps", a new "crossbolted
type" block would be better alternative than converting your existing block to the "crossbolted cap" design.

Q#6 - Wouldn't hurt, especially at the hp level you're shooting for. Good alternative to the "crossbolt" caps/block scenario. Just have a good increased-capacity (8qt at least!) baffled oilpan, 1/2" pickup tube (modify block mount for tube) and hi-volume oil pump.

Food for Thought!!