307 [1968-1973]

307 CID: 1968-1973

BORE:

STROKE:

DECK HEIGHT:

DECK CLEARANCE:

COMPRESSION HEIGHT:

ROD LENGTH:

ROD RATIO:

ROD JOURNAL DIA.:

MAIN JOURNAL DIA.:

MAIN BEARING BORE DIA.:

3.875

3.250

9.025

0.025

1.675

5.700

1.750

2.100

2.450

2.641

BORE vs STROKE

BORE

STROKE

CRANKSHAFT

CID/Liter

3.875

3.875

3.875

3.875

3.875

3.000

3.100

3.250

3.480

3.750

265/283/302

262

307/327

267/305/350

400

283.0/4.6

292.4/4.8

306.6/5.0

328.3/5.3

353.8/5.8

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.

307 CID: 1968-1973
BORE: STROKE: DECK HEIGHT: DECK CLEARANCE: COMPRESSION HEIGHT: ROD LENGTH: ROD RATIO: ROD JOURNAL DIA.: MAIN JOURNAL DIA.: MAIN BEARING BORE DIA.:			3.875 3.250 9.025 0.025 1.675 5.700 1.750 2.100 2.450 2.641
BORE vs STROKE
BORE	STROKE	CRANKSHAFT	CID/Liter
3.875 3.875 3.875 3.875 3.875	3.000 3.100 3.250 3.480 3.750	265/283/302 262 307/327 267/305/350 400	283.0/4.6 292.4/4.8 306.6/5.0 328.3/5.3 353.8/5.8