307 CID: 1968-1973

 

 

BORE:

3.875

 

BORE vs STROKE

STROKE:

3.250

 

BORE

STROKE

CRANKSHAFT

CID / Liter

DECK HEIGHT:

9.025

 

3.875

3.000

265/283/302/

283.0 / 4.6

DECK CLEARANCE:

0.025

 

3.875

3.100

262

292.4 / 4.8

COMPRESSION HEIGHT:

1.675

 

3.875

3.250

307/327

306.6 / 5.0

ROD LENGTH:

5.700

 

3.875

3.480

267/305/350

328.3 / 5.3

ROD RATIO:

1.750

 

3.875

3.750

400

353.8 / 5.8

ROD JOURNAL DIA.:

2.100

 

MAIN JOURNAL DIA.:

2.450

 

MAIN BEARING BORE DIA.:

2.641

 

  Introduced in 1968 it was the replacement for the 283-CID. It had the same 3.875-inch bore as the 283-CID and a stroke of 3.25-inch which is the same as the 327-CID. It was dropped in 1973. This block can be bored 0.125-inch with a failure rate of about 1 in 10 due to porosity in the cylinder walls. The 307-CID block is notched at the bottom of the cylinders to give rod clearance for the 3.48-inch crankshaft.

Back to SPECIFICATIONS

<< 305 - HOME - HEADS INDEX - BLOCK INDEX - 327 >>