Chevrolet Performance GM Goodwrench 350 Cast Iron Long Block Truck Engine
809-12681430
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350 Truck Engine
Engine Break-In Procedure
Use conventional or break-in oil (non-synthetic) for the first oil change, be sure to check the oil level in the engine and prime the oil system with an engine priming tool.
Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. This is critical to break in the camshaft.
Drive the vehicle with varying speeds and loads on the engine for the first 30 miles. Be sure not to use a lot of throttle or high RPM. Run five or six medium-throttle accelerations to about 3000 RPM (40 to 50 MPH), then letting off in gear and coasting back down to 20 MPH. Run a couple of hard throttle accelerations up to about 5000 RPM (55 to 60 MPH), then letting off in gear and coasting back down to 20 MPH.
Let the engine cool and change the oil and filter using conventional (non-synthetic) oil and check coolant level, top off if necessary. Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading. Change the oil and oil filter again using conventional (non-synthetic) oil. Keep an eye on oil level during the first thousand or so miles.
It would be suitable to use synthetic motor oil after the second recommended oil change and mileage accumulation.
what are the significant differences between the JEGS Replacement Crate Engine for 1987-1995 GM Truck, SUV, Van with Chevy TBI 350 ci, 5.7L Part Number: 059-8758 and Chevrolet Performance GM Goodwrench 350 Cast Iron Long Block Truck Engine besides $1000
Will this engine bolt up to a 700r4 transmission?
Is this engine or the Jegs engine CA smog legal?
why not a 4 bolt main caps or can you order it with 4 bolt crank main caps
Does this motor come with the number one cylinder timing set on top dead center
Hi What flex plate size (tooth count) do you recommend for this engine? Thanks
What type of tuning is required of the tbi on a 305 vs 350? These engines are only obd1 controlled. Would you be referring to jetting?
Witch of these two would be better for a 1993 gmc sierra sle truck Chevrolet Performance 12681430 GM Goodwrench 350 Cast Iron Long Block or JEGS Performance Products 8758 for replacement engine ???
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