OMG The things that pop up at last after so many years...run that crate engine number found this
The service-replacement crate engine was 12513151 (long ago discontinued.)
GM #12513151 350 Crate Engine Specifications:
9.50 to 1 Compression Ratio
2–Bolt Main, 1-Piece Rear Seal, 4.000” Bore Block
Cast Nodular 3.480” Stroke Crankshaft
Cast Iron Heads, 64cc
1.940” / 1.500” Valves
0.351” / 0.386” lift, Hydraulic Roller Camshaft
180° / 195° Duration @ 0.050” Lift
After so many years...
And I had found this but it was only close:
Engine a LO5 SBC 350.
About the same as the light-truck LO5, but with flat-top pistons instead of dish, and the roller cam.
All I was able to find back then was this:
Engine manufacturer:
GM Chevrolet Small-Block V-8 350
Engine type: spark-ignition 4-stroke
Fuel type: gasoline (petrol)
Fuel system: indirect injection
Charge system: naturally aspirated
Valves per cylinder: 2
Cylinders alignment:V 8
Displacement: 5733 cm3 / 349.8 cui
What power?
Horsepower net: 175/185 hp (SAE net)
Torque net: 295 ft-lb @ apox 1800/1900 holds until 2300
Cylinder head:
L05s were used primarily with casting number 14102193 (64cc combustion chambers) cylinder heads with swirled intake ports - the intake ports were designed for fuel economy (the design was also shared with the 103 heads used on the 4.3L with TBI). The swirl ports (known to GM as a vortex chamber) along with the irregular shape of the combustion chambers limit the airflow and horsepower output where they did not provide a fast burn, later phased in with the 1996+ Vortec heads. A majority of the L05s used with the truck/vans had conventional flat tappet camshafts while the Caprice 9C1 (1989–93) had a roller cam. L05 usage was replaced by the LT1 after 1993 in GM B-Bodies until production ceased in 1996. In mid-1996 the L05 was equipped with Vortec heads used in the 1996 G30.
And a couple of years ago I learned a trick I NEVER heard of on how to down shift a 1950s 3 speed T95 with either a R10 or R11 Overdrive at speed into first gear without grinding teeth...just have it IN overdrive and with it free wheeling and push in the clutch they would down shift LIKE a fully sycoed gear....
Sadly when I had a 56 Studebaker with that transmission back in the day I ground a lot of gears downshifting and there was NO info about HOW to use those old transmissions...