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The one I got did not look that bad. Whew! But I am now rebuilding it and hope to have in the truck by summer. I have a running one in the truck now that might be a better fit for you to rebuild. It still passes smog, Gets regular oil changes and has the intake with it. I don't feel so bad about how my garage looked now. I had the same mess under the motor as you when I disassembled it. Man, how we love challenges.
The one thing I always was interested in was the weights of different connecting rods, in terms of the stock ones and what aftermarket rods weigh.
I figure that heavier/lighter rods and/or pistons would throw off the balance of the motor, in relation to the balance shaft.
I've heard that when they race these motors, they remove the balancing shaft alltogether, and I wonder if that's why - it's impossible to really balance the motor after the weights change...
The one thing I always was interested in was the weights of different connecting rods, in terms of the stock ones and what aftermarket rods weigh.
I figure that heavier/lighter rods and/or pistons would throw off the balance of the motor, in relation to the balance shaft.
I've heard that when they race these motors, they remove the balancing shaft alltogether, and I wonder if that's why - it's impossible to really balance the motor after the weights change...
Any change in component weight above 1 gram would equal a vibration in the engine. The crank has to have the counterweights matched to the weight of the rod and piston combo.
Once you change the rod and piston then you balance the crank to that weight and you will be fine.
I doubt that the balance shaft has anything to due with weight of the rods and pistons. Its more there for vibration due to firing order.
If someone does remove the balance shaft without taking the proper steps then that will cause a loss of oil pressure on the driver side head and may cause cam/valvetrain/head damage. Removing the balance shaft is easy when its done right.