i have a 90 350sdl so i have an interest in that motor.

only two slight disagreements with marshall.

first, i have heard of at least two here that have experienced bent rods on a factory replacement block.

personally i dont think the problem is weak rods. i think they are experiencing either hydrolock from leaking head gaskets or bending them on blobs of tar and or carbon. no rod in the world will sustain an attempted compression of fluid or solid material. they are designed to compress air only.

personally, if i experience a bent rod with mine i will rebuild with a 3.0 liter version of the 603 as these are not known to bend rods.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.