Wilcap Co.

Cadillac Engine Adapters & Parts

Part Number Guide

Engines

303=331 C.I OHV V8(We call it a 303 because it shares a very similar bolt pattern with the Oldsmobile 303 C.I. engine.) 1949-1953 Cadillac

346=1938-1948 346 C.I. Cadillac Flathead V8

CAD=1954 -1963 331,365 & 390 C.I. Cadillac OHV V8

Transmissions

AT=Automatic Transmissions

MT=Manual Transmissions

350= Chevrolet Small and Big Block Bellhousing Bolt Pattern

302= Ford 1965 up Ford Small Block Bellhousing Bolt Pattern

BOP=Buick Olds Pontiac Cadillac (1966 to 1986 Iron Block V8) Bellhousing Bolt Pattern

FE= Steel Billet Flywheel

AL = Aluminum Billet Flywheel with Steel Friction Face

CAD-350

1955-1963 Cadillac Engine to GM V8 Automatic

CAD-350ATChevy (Also Available with BOP Pattern)

CAD-350MT

Adapter Kit comes with Adapter plate, Flywheel, Pilot Bearing Adapter and fasteners.

** Starter is Mopar Small Block (318, 340, 360) (Not included in kit)

Note 1.. Matched Chevrolet transmission and Bellhousing. 10.5" Bell is recommended.

Note 2. Flywheel is drilled for 10.5" B&B/Diaphragm bolt pattern. Clutch disk is 10.5 with your transmission input shaft splines.

 

CAD-350MTChevy (also available for use with BOP bellhousing)

CAD-EFM is similar to CAD-350MT but uses Ford 8RT bellhousing from 49-53 Ford truck or Mercury

Download PDF

49-53 CADILLAC V8 TO EARLY FORD/MERC P/N303-EFM

CADILLAC 36-48 V8 TO CHEVY AUTO/MANUAL TRANS P/N 346-350

55-64 CADILLAC V8 TO CHEVY AUTO/MANUAL TRANS P/N CAD-350

303-350

303-EFM adapter plate with modified 59A-350 bellhousing to use with 32-48 Ford Style Throw Out Bearing

Also available with GM style throw out bearing fork

CAD-302 Installed

The CAD-302 Allows the use of the Small Block ford bellhousing and transmission to the back of the 55-63 Cadillac engine

346-350AT

Flathead Cadillac to Chevy Auto trans. Due to differences in crankshaft bolt pattern and dowel pin location, customer must provide specifics of engine. Uses modified Mopar 12volt min starter

FLYWHEELS

Part Number	Description / Material		Ring Gear	Avail. Pressure Plate
FW303M	1949-1955 Marine flywheel  Aluminum		145T	None
FW303AL	1949-1955 Aluminum  With Steel Insert		145T	4,5,6,7
FW303S	1949-1955 Replacement Steel		145T	4,5,6,7
FWCADM	1956-1963 Marine flywheel  Aluminum		176T or 166T	None
FWCADAL	1956-1963  Aluminum  With Steel Insert		176T or 166T	4,5,6,7*
FWCADS	1956-1963 Replacement Steel		176T or 166T	4,5,6,7*
FWCAD350M	Marine Aluminum for use w/adapter		130T	None
FWCAD350AL	Aluminum W/Steel Insert for use w/adapter		130T	6
FWCAD350FE	Steel for use with adapter		130T	6

*166T Flywheels not available with 11" PP Patterns. 145T & 176T ring gear flywheels may require use of customers torus cover ring gear depending on availability of NOS ring gears.

Pressure Plate Bolt Patterns;

1.	8" Diaphragm
2.	8.5" Diaphragm
3.	9 1/8", 9 1/4", 9.5" B&B and Diaphragm
4.	10", 10.5", 10.95" B&B and Diaphragm
5.	11", 12" B&B and Diaphragm
6.	10", 10.5" Long and 10" B&B and Diaphragm
7.	11" Long and Diaphragm
8.	11.5" & 12" Long and Diaphragm

ENGINE ID

1949 to 1954 331 C.I. have the cast in bellhousing with the starter bolted to a removable housing

1955 to 1964 331,365 & 390 C.I. Have a modern style "Flat Back" block with the starter bolted to the original bellhousing.

Flathead Cadillac 1936-1948 346 C.I. Note; the dowel pin location and crankshaft bolt pattern vary depending on the original transmission

Wilcap Company

P.O. Box 763 Pismo Beach CA 93448

(805) 481-7639

FAX (805) 343-5000

EMAIL pmcguire@wilcap.com

NOTE; Please Put "Wilcap" or "Sharp" in subject line of email