Sorry for the off topic but this was a really cool Ford engine we saw at Road America. It was in a Formula 5000 car, a 1970 Chinook. A BOSS 302 with dual inline autolite carbs.
were an innovative way to get around the Trans-Am requirement for no more than 2 four-barrel carbs. The carbs are actually close copies of the Weber IDA-IDM design with the bodies configured as four in line instead of two in line.
Since we now have electronic fuel injection, the only reason to use them, is that rules require carbs. Since few were made in the first place, theyre unbelievably expensive. (BTW, I think I know who has at least one, if anyone's interested.)
KS
Cross Boss only used in scca as Autolite single inline
July 26 2008, 5:42 PM
I was kind of hot in 72 to build a drag car, I was crewing on local friends attempt at a pro stock in a converted 1968 mustang gt which was bought from Bruce Sizemore who was a FoMoCo Zsm the aforesaid car was supposedly a factory 427 390 I know its claimed they were never built at the factory only in the Cougar?
At any rate we were running a pro stock with HR heads and I did do the Hydro to solid lifter conversion
on the assumed original block at any rate the Mustang was kind of a slug so we pulled the '27 and had It rebuilt with tunnel port heads from the then porting Guru CJ batten with a homemade Tunnel ram out of aluminum tubing on a dual quad TP manifold This combo woke the Mustang up . At any rate I got the fever and being blessed with youth and a capacity for 50 hour work weeks and 40 hours of crewing on the mustang I decided to convert my non gt K fastback to a boss 302. So I ripped the HIPO out threw it on the floor in the back of the garage and started to build my boss per the muscle parts book I ordered a Short block which was back ordered supposedly for re-engineering the TRW slug which were prone to cracking at the pin bosses The build continued in slow motion in 72 Got the TRW trans am titanium valves the Dozx cam .600 lift, special lifters different radius,and the famed Dozx rockers,but i was stymied by an intake manifold I didnt want to go dual quad and tried to buy the inline Cross Boss but there was nothong else .
My parts manager Andy The Rebel knew Bud Moore and so I called him in spartanburg sc And asked his advice He stated that he had a '69 dual 4500 scca trans am setup but as the car was to see some street duty he suggested i use the 1970 mini Plenum at any rate I drove the family 1963 futura 260 convt down and paid him the astounding sum of $300 for the manifold and $100 for a left over holley.
I Must say that was a cool ass race car 8500 Rpm shift point and a 10.99 @ 118 but as usual I got bored after about two years and bought a clapped out interior griffith 400 stock K 289 with a beautiful Imron Yellow Paint job which turned 11.17 @110 that however was another story However to the point I have seen dual carb cross boss manifold tops but Maybe they were home made such as on Ken Van Cleeves Record holding Street Roadster. The only year a dual quad Boss raced was '69 with sand cast 4500s on an IR manifold though the ill fated 302 tunnel port had smaller holleys and the cougars raced with em due to fran hernandez getting scca to approve the option only on the cougars
It'll take me some time to digest all the great stuff i've just read in your post! This 68 Mustang sounds most interesting and maybe one of our researchers here can see what car Bruce Sizemore got, i'm of the belief they actually made some 427 hydraulic Mustangs in 68 too.
You've had some really interesting cars, any pictures you can put on here?
You Confirmed my response warren single inline on Cross Boss only Dual inlines non FoMoCo best of my knowledge btw the bore spacing of the inlines matched up with cant valve intake ports on THE BOSS
To bring this back on topic, at one time you could buy a adapter intake to run 351C intakes on FE blocks, and spacers are available to run BOSS 302 intakes on 351C's
so all you need is to buy a complete Cross Boss Intake and Carb ($2000) and then find one of those PSE Intakes For the FE (probally 300-500 on the bay)and then a set of spacers from Price Motorsports ($200?)
a twin inline setup at first, seems like it didn't go too far as it was too much on too small. I have the old original magazine with them on the cover somewhere out in the shop from when they first came out, I'll look for it, seems like a lot of the parts were borrowed from the 4300 carb. I remember Cantrell and those guys used to rave about the Bud Moore manifold, they used to call it the "mini-box". I built the engine in my buddy's '70 Boss in '79, took the heads to Hannan's and and had them put 5/16 stem tulip 426 Hemi valves in it, and an old trick, used the old small-block "Sullivan" cam which ran most excellent in a high-lift Boss, took the 2x4 tunnel ram off it, went back to a stock manifold/ 750DP, still runs sweet and 60lbs oil pressure today.
I also still have the Car&Driver with the comparison test between the '68 Z-28 and the Tunnel Port Mustang, Chebbie had the cross-ram, TP had a "normal" 2x4 Holley setup. The Mustang showed up with the first-time-seen-in-public F60-15 Polyglas tires, without Goodyears' permission, the comment was that "they made the Camaro's E70-15's look like Suzuki tires" LOL. Sam Posey did the driving, street, drag, and road course
I'm putting together a Boss 302 for my street 70 boss.I have had the duel-inline setup for almost 30 years setting on the shelf,NOS.We are trying to get 800hp out of it with iron boss heads,new block at+30.We had a solid roller cam ground by Schneider Cams in cal.It's 12.5 compression redline will be 9500 to 10,000.I will post the dyno results.
style and could be machined either for FI or drilled to mount four DCOE sidedraft Webers. To my mind, the sidedraft Webers work much better, at least on the street, than the downdrafts. My total experience was limited to observation on the downdrafts, but I used DCOEs on two different cars. In both cases, they seemed to nearly double the midrange responsiveness.
I owned one of the Cleveland Trans-Am dual Dominator manifolds. I ultimately traded it for a day's worth of suspension work on my '79 Mustang. (That was a good deal at the time!!!) KS
No it wasn't. It was basically like what Kinsler sells today. Used downdraught webers.
July 29 2008, 1:43 PM
Hilborn throttle bodies would bolt down on top of it, or it could be drilled for the inline 4V's and I suppose, the downdraught webers, though I never actually saw those mounted on it.
There used to be a pair of cars that ran with Boss 302's, an early Mustang notchback and a Maverick, both ran low 10's, no tubs just 11.5x28.5's and four speeds. A high RPM Boss, like an FE, has it's own sound, a real sharp howl- watching those two go off the line wheels up side by side at 9500 plus sounded soooo saweeet. Tattle-tale on one was at 10300, and that was in the late 70's. A good Boss sounds pretty good at 7500, but get up around 8500 and up and the pitch gets hair-on-your-neck evil
