Jim Benitez/Jalopy Shoppe RPU
AUTOMATIC OR MANUAL TRANSMISSION ADAPTERS.
KITS INCLUDE ALL NEEDED HARDWARE.
Thank you for your inquiry about our engine to transmission adapters for Early Hemi and Poly engines. We currently have several types in production for these engines. We've been making Early Hemi adapters longer than anyone else in the business and there are more "Wilcap" adapters behind Early Hemis than any other brand
P/N 392-350AT is for late General Motors automatics (i.e., Powerglides, Turbo Hydramatics, THM 700-R4, etc.) or 392-350MT is for any manual transmission using a Chevrolet bellhousing originally designed for the iron block engines. It comes drilled with the Chevrolet Bell housing bolt pattern. It can be ordered with the BOP bolt pattern to bolt directly to late Buick, Olds and Pontiac transmissions/bellhousings. This adapter kit contains the adapter plate, a crank hub spacer and a flex plate. The adapter is 3/4 inch thick and also uses the late model Chrysler V8 starter, mounted on the left or by request on the right.
392-350AT- Early Hemi to Chevy Automatic
Available with starter on either side and with or without Buick/Olds/Pontiac bolt pattern (392-350ATBOP = Auto adapter with BOP pattern) (Product Sheet Download)
392-350MT- Early Hemi to Chevy Manual Transmission
Available with starter on either side and with or without Buick/Olds/Pontiac bolt pattern. Available with billet steel or aluminum flywheel (Product Sheet Download)
392-318AT- Early Hemi to Chrysler small block auto transmission (Product Sheet Download)
For the Chrysler A 727 Torqueflite (i.e., 318, 340, 360 bell housing pattern). It consists of an adapter plate, a crankshaft hub spacer and a flex plate or flywheel. This adapter is 1 inch thick and uses the late model Chrysler V8 starter that bolts to the transmission in the stock location. We have been manufacturing this one since the mid sixties.
Manual Transmission version for A-833 with Small Block bellhousing. Availble with steel or aluminum flywheel.
392-318MT- Early Hemi to Chrysler small block manual transmission (Product Sheet Download)
392-302MT- Early Hemi to Ford Small Block. (Product Sheet Download)
The 331-318AT adapts the 1951-1953 331 Chrysler ( Extended Block or Bellhousing) to Chrysler 727 automatic. You can download the product sheet here:
This adapter uses a modified small block Chrysler transmission case. No modification of the block is needed. The three choices for installation are: Send us your transmission (assembled or case and front pump only), send us your transmission front pump, or we'll send you the adapter only. Adapter includes complete instructions for modification of your transmission and for alignment of the adapter to your transmission, flexplate, hub spacer, and fasteners. Includes flexplate. Uses stock or aftermarket starter.
The BH 331-350 adapts the 1951-1953 331 Chrysler ( Extended Block) to the Chevy "Muncie" transmission bolt pattern and is designed to use your stock 331 flywheel and starter and a hydraulic throw-out bearing. Comes complete with fasteners, instructions, and pilot bearing adapter.
BH 331-FTL - 1951-1953 331 Chrysler ( Extended Block or Bellhousing) to Ford "Top Loader" 1964-1978. Uses Stock flywheel.Uses stock or aftermarket starter.
331-FT5 - 1951-1953 331 Chrysler ( Extended Block or Bellhousing) to Ford T5 1979-1992. Uses Stock flywheel. Uses stock or aftermarket starter.
392-EFM- Early Hemi to Early (1932-1948) Ford 3 & 4 Speed Transmissions. (Product Sheet Download)
P/N 392-EFM Adapts the Early Hemi to the Ford 1932-1948 or Merc 1939-1950, Ford Truck 1/2 to 1 1/2 ton 1949-1953 transmission. The adapter moves the starter to the passenger side. The original starter plate is required (#1613713 or equivalent). Includes the pilot bearing adapter and fasteners. We can supply the correct pressure plate and clutch disk for this adapter.
OIL FILTER BYPASS BLOCK OFF
Critical little part! Forces all of the oil through the filter instead of allowing a significant portion to bypass the filter. Replaces the original bypass valve located under the rear main cap.
Wilcap makes 9 different versions of the Early Hemi Flywheel;
Description / Material
Avail. Pressure Plate
|FW331M||Marine flywheel Aluminum||146T||None|
|FW331AL||Aluminum With Steel Insert||146T||4,5,6,7|
|FW392M||Marine flywheel Aluminum||172T||None|
|FW392AL||Aluminum With Steel Insert||172T||4,5,6,7|
|FW392350M||Marine Aluminum for use w/adapter||130T||None|
|FW392350AL||Aluminum W/Steel Insert for use w/adapter||130T||4,5,6,7|
|FW392350FE||Steel for use with adapter||130T||4,5,6,7|
Pressure Plate Bolt Patterns;
|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|
Chrysler used a common block and crank shaft pattern on the Dodge, Desoto and Chrysler Polys and Hemis EXCEPT for the 1951 to 1953 331c.i. Chrysler, also called an extended block.
1951-1953 Chrysler Extended Block
The extended block has a round pattern that is similar to an S.A.E. pattern found on industrial engines and uses a cast starter housing that bolts vertically to the engine. One word of advise; don't lose the starter housing as it can be tough to find.
The rest of the Hemis use a bolt pattern that is common to the Chrysler LA Small Block and the new 5.7L Hemi BUT the dowel pins are in different locations and the crankshaft stickout distance is different. And while you can bolt a LA bellhousing up to the early Hemi, there's a lot of grief involved in getting it right and even more if you don't.
"REGULAR" EARLY HEMI AND POLY BLOCK
Also the 426 Hemi flywheel has the correct bolt pattern but does not register on the flywheel correctly and can't be used.
The crankshafts all share a common 8 bolt pattern and all use the outside diameter of the flange to register the flywheel. One bolt hole is offset. They all used 7/16" fasteners to attach the flywheel and stock they are not threaded.
All of our Hemi adapters come with the option of 1/2" crank bolts. The holes are drilled to a few thousands over the tap drill size for 1/2-20 NF. If your going to install a manual trans its worth the time to tap the holes. We can supply a "loaner" tapping fixture to our customers that makes the process easier.
There are multiple sizes of pilot bearing bores and it is best to measure bore before ordering a manual transmission adapter.
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