Hello Geoff,
The '65-72 Master Parts Catalog (MPC) can sometimes be more than a little confusing. Much of it is from not removing any references to the stillborn '71 Boss 302, referred to as a 302 Special in the '71 Mustang applications. The transmission for the '71 Boss 351 is RUG-AV1, which is a 2.78 wide-ratio transmission. This transmission is Ford part # D0ZZ-7003-D, which was replaced with a D2ZZ-7003-D (RUG-BJ). The D2ZZ-D (RUG-BJ) was cataloged for the '72 R and Q and was utilized as the replacement for the RUG-AV1 used for the '71 Boss and limited availability Q 351.
When looking at the '71 transmission application RUG-AV1, mentally remove the '302 Special" reference, and you will see the two vehicles 351 4B (M) and 351 Spl (R) that used this transmission. For the RUG-AW1 application, remove the 302 Special references, and it leaves the second transmission choice for the 351 4BL (M). The '71 M 4sp I drove had the RUG-AV1 trans with a 3.50 gear, so the differential gear probably was the deciding factor on what transmission the M code left the factory with.
The two transmissions listed in the '72 R & Q applications, before and after 12/1/71, result from more government "Watch Dogging" over us. 12/1/71 is the date Ford started installing the Federally mandated 1972 seat belt warning light/buzzer system. '72 vehicles built before 12/1/71 received the D2ZZ-7003-D (RUG-BJ). '72s (built after 12/1/71) and '73 Mustangs received the D2ZZ-7003-H (RUG-BJ1). This transmission had a seat belt warning sensor switch in the left front of the transmission case. This switch was also used on three and 4sp Torino, Mustang, Maverick, and '73-75 Broncos. The switch functioned the same as the automatic cars when you placed the vehicle in gear without fastening the seat belts. This is the only difference between the two transmissions. There was a plug Ford released for the transmission case when it was used to service a car built before 12/1/71 that did not use the switch.
OK, that is enough number and letter salad for transmissions today!
@pavestone2460,
The seller is not giving this car away; this is your hard-earned money, whether Australian or U.S. dollars! I would definitely perform a thorough hands-on inspection, starting with the VIN discrepancy. The info you have received so far is excellent. To check the numbers matching claim, you can check for a partial VIN on the left rear of the block right below where the head mounts to the block. The front upper flange, where the transmission mounts to the bell housing, is another area to check for a partial VIN. The partial VIN will have 1(1971) and F for the assembly plant (Dearborn) and the six numbers of the consecutive serial number. So if the Vin on the title and Ford invoice shown are correct for this vehicle, the partial VIN would read "1F 180926".
Some members here have been burnt on fake Boss parts, such as carburetors, distributors, Rev limiters, and dipsticks. When a genuine Boss 351 dipstick that retailed for under $5.00 when discontinued can bring $500.00 to $600.00 and above on eBay, the temptation is great for these * %♣&♫¢ "THIEVES" to manufacture/clone said fake parts!! The rev limiter on the right front shock tower should have an ink stamp DOZF-12450-B, 6150 RPM if O.E. The carburetor on the Motor Trend link has an incorrect tag. The D1ZF-ADA is for a 302 2BL carb. D1ZF-ZA is the correct O.E. carb. I'm surprised the experts at Motor Trend missed that. The O.E. distributor is D1ZF-12127-DA.
Besides myself, many forum members here have a good handle on these numbers, including several Boss owners. Regardless of U.S. or Australian dollars, that is a costly vehicle. During your inspection, if you feel you need more information or clarification on something they may not know, you know what group to contact!
Please keep us in the loop on how things go. We would really like to add another Boss owner to our ranks!
The '65-72 Master Parts Catalog (MPC) can sometimes be more than a little confusing. Much of it is from not removing any references to the stillborn '71 Boss 302, referred to as a 302 Special in the '71 Mustang applications. The transmission for the '71 Boss 351 is RUG-AV1, which is a 2.78 wide-ratio transmission. This transmission is Ford part # D0ZZ-7003-D, which was replaced with a D2ZZ-7003-D (RUG-BJ). The D2ZZ-D (RUG-BJ) was cataloged for the '72 R and Q and was utilized as the replacement for the RUG-AV1 used for the '71 Boss and limited availability Q 351.
When looking at the '71 transmission application RUG-AV1, mentally remove the '302 Special" reference, and you will see the two vehicles 351 4B (M) and 351 Spl (R) that used this transmission. For the RUG-AW1 application, remove the 302 Special references, and it leaves the second transmission choice for the 351 4BL (M). The '71 M 4sp I drove had the RUG-AV1 trans with a 3.50 gear, so the differential gear probably was the deciding factor on what transmission the M code left the factory with.
The two transmissions listed in the '72 R & Q applications, before and after 12/1/71, result from more government "Watch Dogging" over us. 12/1/71 is the date Ford started installing the Federally mandated 1972 seat belt warning light/buzzer system. '72 vehicles built before 12/1/71 received the D2ZZ-7003-D (RUG-BJ). '72s (built after 12/1/71) and '73 Mustangs received the D2ZZ-7003-H (RUG-BJ1). This transmission had a seat belt warning sensor switch in the left front of the transmission case. This switch was also used on three and 4sp Torino, Mustang, Maverick, and '73-75 Broncos. The switch functioned the same as the automatic cars when you placed the vehicle in gear without fastening the seat belts. This is the only difference between the two transmissions. There was a plug Ford released for the transmission case when it was used to service a car built before 12/1/71 that did not use the switch.
OK, that is enough number and letter salad for transmissions today!
@pavestone2460,
The seller is not giving this car away; this is your hard-earned money, whether Australian or U.S. dollars! I would definitely perform a thorough hands-on inspection, starting with the VIN discrepancy. The info you have received so far is excellent. To check the numbers matching claim, you can check for a partial VIN on the left rear of the block right below where the head mounts to the block. The front upper flange, where the transmission mounts to the bell housing, is another area to check for a partial VIN. The partial VIN will have 1(1971) and F for the assembly plant (Dearborn) and the six numbers of the consecutive serial number. So if the Vin on the title and Ford invoice shown are correct for this vehicle, the partial VIN would read "1F 180926".
Some members here have been burnt on fake Boss parts, such as carburetors, distributors, Rev limiters, and dipsticks. When a genuine Boss 351 dipstick that retailed for under $5.00 when discontinued can bring $500.00 to $600.00 and above on eBay, the temptation is great for these * %♣&♫¢ "THIEVES" to manufacture/clone said fake parts!! The rev limiter on the right front shock tower should have an ink stamp DOZF-12450-B, 6150 RPM if O.E. The carburetor on the Motor Trend link has an incorrect tag. The D1ZF-ADA is for a 302 2BL carb. D1ZF-ZA is the correct O.E. carb. I'm surprised the experts at Motor Trend missed that. The O.E. distributor is D1ZF-12127-DA.
Besides myself, many forum members here have a good handle on these numbers, including several Boss owners. Regardless of U.S. or Australian dollars, that is a costly vehicle. During your inspection, if you feel you need more information or clarification on something they may not know, you know what group to contact!
Please keep us in the loop on how things go. We would really like to add another Boss owner to our ranks!
