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Old 01-22-2013, 10:32 AM
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What are the head casting numbers and does this motor have a flat top piston.

You want to end up with a 10:1 compression ratio.
A built 305 really likes to rev and does not get real busy until 3000+ rpm.
So, for a truck you want a fairly stiff gear EG: a 4.10 ratio depending on the trucks tire diameter.
For the same reason you want a high stall converter for your hot rodded 305.
pcik a converter with a rated advertized stall speed that is 500rpm above what you really want
as a 305 makes less torque than a 350 cid engine. The actual stall will be lower.
EG a "3600 stall 10" converter" will be a sweet street 3000 stall, behind a 305.
You don't want to come up short on the converter.
Thats the nature of built small CID SBC engines. Get the gears and converter right and it will run really well.
L-31 vortec heads shaved to 57cc work really good on this motor with a flat top piston, shim head gasket and a cam.
Performer RPM intake, 650-750carb, headers and dual exhaust.

if you are willing to fully home hand port a 4416 305HO head it will work really well too.
The 58cc aluminum "corvette" heads from a ZZ4 crate motor or L-98 TPI motor rock with porting on this motor too.
A 305 likes improved cylinder head flow and compression ratio just like any SBC.

Last edited by F-BIRD'88; 01-22-2013 at 10:40 AM.
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