Ford guy questions about 429s

[Rory McNeil]

First off, there was never a Boss 429 Mach 1, the only Mustangs ever sold by Ford with a Boss 429 engine, were the 1969 & 70 Boss 429 Mustangs, which were NOT a Mach 1. Now, in 1971, there were Mach 1`s with 429 CJ or SCJ engines, but these are iron headed wedge engines, whereas a BOSS 429 has aluminum (semi) Hemi chamber heads. There is likely some confusion, as there were 429 Thunder Jet engines, as well as 429 Cobra Jet, & 429 SUPER Cobra Jet, and in some early literature, the Boss 429 Hemi was called the 429 CJ H.O.
To further muddy the waters, the 429 4 barrel Thunder Jet was rated at 360HP, the 429CJ at 370, the 429SCJ at 375, the Boss 429 was also rated at 375. The ThunderJet engines had hyd. cams and an Autolite 4 barrel carb, the Cobra Jet had a hotter hyd. cam, bigger valve & port heads, with a Rochester Quadrajet, the Super Cobra Jet used a solid cam and a Holley 780. In a 70 or 71 Torino or Cyclone, you could have gottern either the 429 ThunderJet, Cobra Jet, or Super Cobra Jet, in the 71 Mustang, only the CJ or SCJ were available. The only Cobra Jet available in a Mustang from 68 thru 70, was the FE 428. Now, wasn`t that simple?!

[rayfin]

I stand corrected. 70 Boss 429 Mustang with aluminum (semi) Hemi chamber heads.

[Bobby DiDomenico]

Originally Posted by Rory McNeil

the only Mustangs ever sold by Ford with a Boss 429 engine, were the 1969 & 70 Boss 429 Mustangs,

Rory,
Don't forget the early 1969 production runs had the NASCAR based block and heads o-ring set up and the later ones and the '70's had the street engine o-rings which were reversed between the heads and the blocks on the T and S versions. Two guys here and them, one a Wimbledon (?) White with the track motor and the other a later Jade Green with the Street one. If memory serves me correctly the crank and rods were different as well when they rebuilt them.

[k.pascoe]

Originally Posted by Bobby DiDomenico

Rory,
Don't forget the early 1969 production runs had the NASCAR based block and heads o-ring set up and the later ones and the '70's had the street engine o-rings which were reversed between the heads and the blocks on the T and S versions. Two guys here and them, one a Wimbledon (?) White with the track motor and the other a later Jade Green with the Street one. If memory serves me correctly the crank and rods were different as well when they rebuilt them.

The crank was the same between the two motors. There was the S rod motor a very heavy beefy rod, but shorter that the standard 429/460 rod. There was also two styles of boss head; the full hemi chamber (for superspeedways) and the squished chamber.( for the short tracks).

BTW -The 1971 police motor was a 429 CJ.

[ALMACK]

Originally Posted by SSDiv6

Yes, this is the market ballpark. EBay would be the best place to sell.

X2...
flea-bay is the best place to gauge what anything is worth at that particular time

Also, try this hard core 429-460 site;
http://www.429-460.com/forum.htm

[BlueOval Ralph]

The crank was the same between the two motors. There was the S rod motor a very heavy beefy rod, but shorter that the standard 429/460 rod. There was also two styles of boss head; the full hemi chamber (for superspeedways) and the squished chamber.( for the short tracks).

The full hemi was run all tracks at one time, the last time I checked the SK book there wer 28 different NASCAR heads the Boss 429 street had orings in heads NASCAR had orings in block decks

Originally Posted by k.pascoe

The crank was the same between the two motors. There was the S rod motor a very heavy beefy rod, but shorter that the standard 429/460 rod. There was also two styles of boss head; the full hemi chamber (for superspeedways) and the squished chamber.( for the short tracks).

BTW -The 1971 police motor was a 429 CJ.