Thread: 350 crate motor

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We purchased a 350 crate motor about two or three years ago. It is the engine gm sells for carb engine replacements.

Would this engine have roller tappet cam or flat tappet?

Im not sure. it would depend on which one you bought

Numbers would be nice - here's but a few of the GM engines available for sale over the past few years.

350/290 HP TECH SPECS: Part Number: 12499529
Engine type: Chevy small-block V-8
Displacement (cu in): 350
Bore x stroke (in): 4.00 x 3.48
Block (P/N 10066034): Cast iron with 4-bolt main caps
Crankshaft (P/N 93426651): Nodular iron
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 12514101): Cast aluminum
Camshaft type (P/N 3896962): Hydraulic flat tappet
Camshaft lift (in): .450 intake / .460 exhaust
Camshaft duration (@.050 in): 222° intake / 222° exhaust
Cylinder heads (P/N 93438648): Iron; 76 cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 8.5:1
Rocker arms (P/N 10089648): Stamped steel Rocker arm ratio: 1.5:1
Recommended fuel: 87 octane
Ignition timing: 34° total BTDC
Maximum rpm: 5100

350 HO TECH SPECS: Part Number: 12499711
Engine type: Chevy small-block V-8
Displacement (cu in): 350
Bore x stroke (in): 4.00 x 3.48
Block (P/N 10105123)): Cast iron with 4-bolt main caps
Crankshaft (P/N 14088526): Nodular iron
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 12514101): Cast aluminum
Camshaft type (P/N 24502476): Hydraulic flat tappet
Camshaft lift (in): .435 intake / .460 exhaust
Camshaft duration (@.050 in): 212'c1 intake / 222'c1 exhaust
Cylinder heads (P/N 12558060): Vortec iron; 64 cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 9.1:1
Rocker arms (P/N 10089648): Stamped steel Rocker arm ratio: 1.5:1
Water pump (P/N 88894341): Cast iron, long-style
Flexplate (P/N 14088765): 14"
Recommended fuel: 92 octane Ignition timing: 10'c1 BTDC @ 700 rpm
Maximum rpm: 5500

ZZ4 350 BASE TECH SPECS: Part Number: 24502609
Engine type: Chevy small-block V-8
Displacement (cu in): 350
Bore x stroke (in)cf6 : 4.00 x 3.48
Block (P/N 10105123): Cast iron with 4-bolt main caps Crankshaft (P/N 12556307): Forged steel
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 10159436): High-silicon aluminum with offset pins
Camshaft type (P/N 10185071): Steel hydraulic roller
Camshaft lift (in): .474 intake / .510 exhaust
Camshaft duration (@.050 in): 208'c1 intake / 221'c1 exhaust
Cylinder heads (P/N 12556463): Aluminum; 58cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 10:1
Rocker arms (P/N 10089648): Stamped steel Rocker arm ratio: 1.5:1
Recommended fuel: 92 octane
Maximum rpm: 5800

ZZ4 350 Turn-Key TECH SPECS: Part Number: 12496968
Engine type: Chevy small-block V-8
Displacement (cu in): 350 Bore x stroke (in): 4.00 x 3.48
Block (P/N 10105123)): Cast iron with 4-bolt main caps
Crankshaft (P/N 14088526): Nodular iron
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 12514101): Cast aluminum
Camshaft type (P/N 24502476): Hydraulic flat tappet
Camshaft lift (in): .435 intake / .460 exhaust
Camshaft duration (@.050 in): 212'c1 intake / 222'c1 exhaust
Cylinder heads (P/N 12558060): Vortec iron; 64 cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 9.1:1
Rocker arms (P/N 10089648): Stamped steel
Rocker arm ratio: 1.5:1
Water pump (P/N 88894341): Cast iron, long-style
Flexplate (P/N 14088765): 14"
Recommended fuel: 92 octane
Maximum rpm: 5500

RAM JET 350 TECH SPECS: Part Number: 12499120
Engine type: Chevy small-block V-8
Displacement (cu in): 350 Bore x stroke (in): 4.00 x 3.48
Block: Cast iron with 2-bolt main caps
Crankshaft (P/N 10243068): Cast iron
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 88894280): Hypereutectic aluminum
Camshaft type: (P/N 14097395) Hydraulic roller
Camshaft lift (in) : .431 intake / .451 exhaust
Camshaft duration (@.050 in): 196'c1 intake / 206'c1 exhaust
Cylinder heads (P/N 12558060): Vortec iron; 64cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 9.4:1
Rocker arms (P/N 12367346): Aluminum roller style Rocker arm ratio: 1.6:1
Recommended fuel: 92 octane
Maximum rpm: 5500

FAST BURN 385 TECH SPECS: Part Number: 12499710
Engine type: Chevy small-block V-8
Displacement (cu in): 350 Bore x stroke (in): 4.00 x 3.48
Block (P/N 10105123): Cast iron with 4-bolt main caps
Crankshaft (P/N 12556307): Forged steel
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 10159436): Hypereutectic aluminum
Camshaft type (P/N 10185071): Hydraulic roller
Camshaft lift (in): .474 intake / .510 exhaust
Camshaft duration (@.050 in): 208'c1 intake / 221'c1 exhaust
Cylinder heads (P/N 12464298): Fast Burn aluminum; 62cc chambers
Valve size (in): 2.00 intake / 1.55 exhaust
Compression ratio: 9.6:1
Rocker arms (P/N 10089648): stamped steel Rocker arm ratio: 1.5:1
Recommended fuel: 92 octane
Maximum rpm: 5800

HT383 TECH SPECS: Part Number: 12499101
Engine type: Chevy small-block V-8
Displacement (cu in): 383 Bore x stroke (in): 4.00 x 3.80
Block (P/N 88962516): Cast iron with 4-bolt main caps
Crankshaft (P/N 12489436): Forged steel
Connecting rods (P/N 12497624): Heavy-duty PM steel
Pistons (P/N 12499103): Hypereutectic aluminum
Camshaft type (P/N 14097395): Hydraulic roller
Camshaft lift (in): .431 intake / .451 exhaust
Camshaft duration (@.050 in): 196'c1 intake / 206'c1 exhaust
Cylinder heads (P/N 12558060): Vortec iron; 64cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust Compression ratio: 9.1:1
Rocker arms (P/N 10089648): Stamped steel
Rocker arm ratio: 1.5:1
Water pump (P/N 88894341): Cast iron
Recommended fuel: 87 octane
Maximum rpm: 5000

ZZ383/425 TECH SPECS: Part Number: 12498772
Engine type: Chevy small-block V-8
Displacement (cu in): 383 Bore x stroke (in): 4.00 x 3.80
Block (P/N 88962516): Cast iron with 4-bolt main caps
Crankshaft (P/N 12489436): Forged steel
Connecting rods (P/N 12497624): Heavy-duty PM steel
Pistons (P/N 12499103): Hypereutectic aluminum
Camshaft type (P/N 12370846): Hydraulic roller
Camshaft lift (in): .509 intake / .528 exhaust
Camshaft duration (@.050 in): 222'c1 intake / 230'c1 exhaust
Cylinder heads (P/N 12464298): Fast Burn aluminum; 62cc chambers
Valve size (in): 2.00 intake / 1.55 exhaust
Compression ratio: 9.6:1
Rocker arms (P/N 12367345): Aluminum roller style Rocker arm ratio: 1.5:1
Recommended fuel: 92 octane
Maximum rpm: 6000

As you can see - some are flat tappet, some are roller. Get a number and we can probably help you out!

Regards,
Glenn

Turn the crank around until both valves on #1 cylinder are closed and the piston is at TDC. Remove the rocker adjusting nuts, rocker arms and pushrods from #1. Shine a very strong light down one of the pushrod holes while you peer down the other pushrod hole. If it's a roller cam, you'll be able to see the sheet metal spider and dog bones.....looks like this....

Well gee Tech, that's what I was gonna say...

Sorry Glenn, should have allowed you more time....

damn--I could put a engine together quicker than typing all those specs

but the answer to the question would be a simple yes---it would have a roller OR flat lifter cam!!!!!

I find myself a man possessed sometimes - actually, I just love the research and have tons of files on this stuff! One never knows when it may come in handy. I converted most to electronic media, so it's fairly easy to find and copy!

Regardless if you cut and pasted or typed it all out, I thank you for the info. Might come in handy one day so I printed it and stuck it in my folder titled "If The Need Should Arise".

When my father passed away (1995) I went through everything in his garage. He had file after file of projects - some he had completed and some were in his "If The Need Should Arise" file. It was bitter sweet at first, but as I continued through his mounds of documentation and paper, it became a time of joy and allowed me to hang on to just a bit more of him. What I'll ever do with the rebuild instructions for a Clinton 3 horse engine is a mystery, but if my kids someday enjoy reading all the "stuff" that I've electronically filed over the years half as much as I did my fathers written files, then it's worth it!

Regards All,
Glenn