I searched here and found some topics on quicker combos but thought there are many more rides that fall in this group.

So if your willing what did you do to get into the 12's in the 1/4 mile? I am curious as to just how stock some of the cars might have been.


B,RB or SB I don't discriminate

Very easy and cheap.

Just as one simple example, as there are tons more out there that are more highway friendly...

'64 Savoy
3775lb street car

-74 cast crank 440 pulled out of a land yacht in the junkyard. It had overheated and smelled of burnt oil pretty bad. It still turned over, so we cleaned off the filth & grime, threw in a used .509 cam & lifters, swapped out the springs, Team G intake, 750 DP, $20 swap meet headers of unknown origin, 10" converter, 4.56 gears and a 30x9 slick netted us 12.80's. (No valve job or anything. Lots of miles on the engine.) Freshened up the heads, added a factory Max Wedge intake, 600 AFB carbs and got it down to 12.40's. I'm sure it would have run the same or better without the Max Wedge intake, but we wanted to get into NSS racing. This was back in the early/mid 90's...had all of $200 in the motor minus the Max Wedge stuff since we had extra parts laying around. It would have been quicker yet if we had something better than a TCI Streetfighter converter.

Was it an ideal highway cruiser? No. But it was driven everywhere including the highway and it would run on crap gas. Contrary to popular belief, the street manners were fine. It did not run warm, idled in traffic, etc... It's all what you are used to though.

I doesn't take much to get in the 12's with nearly any Mopar. A cam, intake, carb, headers, converter, gear and some small slicks should get just about any car in the 12's as long as the weight to cubic inch ratio isn't stupid, like a 318 in a 4200 pound B body.

360 +.030 stock rods, crank, flat top pistons, home ported j's, single plane with 750 dp, TTI's full 2.5" exhaust, small solid 520 lift/ 244 @.050 cam, 3.91 gear, 4K stall, in a 71 demon at 3,460lbs 12.22, at 109.8 mph only time out, needing a jet change.

what car? pretty easy to make a high 12 second b-body with a 440. My old 67 coronet weighed 3850 and ran 12.90 @ 104 with a 9:1 .030 over 440, cast junk pistons, stock rods, crank, stock 906 heads, stock valve trane, Summit 488 cam, RPM intake Holley 750Dp, Cheap headers, Mopar 175k converter (2600), MP shift kit, and 3.91's.
You can do it with 383's and SB's but it will cost you much more.
A 10:1 440, with alum heads or ported iron heads, 500+ lift cam, headers, RPM intake 750-850DP, 2800 stall and 3.91's will get a 3800lb B-body into the mid 12's easy. In an A-body you'll be in the 11's.

My 360 started as a .040 over Napa rebuilt short block. I took it apart to check everything. I had the block decked (deck .015 head 63cc., gasket .028, compression 10.51)reversed the cast dished pistons on the rods and put in good rod bolts and had the rods resized. I put in an old Manley cam that I had. 443 lift 224@.050 I don't remember the lobe seperation but I think it was around 108. I used J heads pocket ported with 2.02 int. valves and 273 adj. rockers an LD340 intake with a 1" 4 hole spacer and a Vac. 750. For exhaust I used heddmen 1 5/8" headers, 3" exhaust with ultra flows ending at the axel. I used a 904 with a Dayco 2,400 stall converter and an 8 3/4 with 3.91's the slicks were 8"x 26"x 14". Suspension consisted of 6yl. bars and comp. eng. adj. shocks in the front and 002/003 superstock springs with Mopar perf. 50/50 xtra long shock in the rear. The car was a 70 Valiant 4 door it weighed 3,320 with me in it. With an electric water pump drive, 5/16" fuel line with holley mech. fuel pump and a homemade fresh air intake (dryer hose and a dual snorkle air cleaner)the best run was 11.96/113 but it typically went 0's and teen's in decent air at Atco and E-Town. Typical 60'was low 1.70's. With a looser converter maybe around 3,500 stall it probably would have gone 11.70's or 80's.

My old set up was stock rods, speed-pro pistons 9.5-1 stock heads .508 mopar cam performer intake went 12.88 best with a 360. now i have x headed 360 with eagle rods kb pistons m-1 single plane 750 dp .525 525 hydro cam from comp 4200 stall with 4.10's and 28" tall tires. only thing i changed was the motors.

Take a look: Click here/archived thread

I went high 11s w/ a VERY mild 440 combo.

3700# '70 cuda w/ SS springs, 3.91 gear, and 26x10 slicks. Full interior, full 3" exhaust w/ tailpipes and factory cuda tips.

'71 440 HP shortblock, bored .040" over. Ross flattop pistons (close to 10:1 compression). Factory forged crank and the original 6 pack rods. Stock oiling system w/ factory pan.
906 heads...nothing but a 3 angle valve job. Even reused the factory valves...NO porting.
509/292 MP purpleshaft cam, stock rockers and pushrods.
Edelbrock Performer RPM intake, 830 holley double pumper.
1 7/8" headers, 3" exhaust w/ 2 chamber flowmasters.
727 w/ a TCI 10" Streetfighter 3500 stall.

This combo ran on pump gas and went 11.80s at 112 mph, 7.50s in the 1/8, 1.67-1.69 sixty foots. Not to mention I put a LOT of street miles on it.


This motor is currently in my dad's '69 road runner only now it has a six pack setup on it, a 4 speed, and 3.55 gears. Hella fun to drive!

2 cheep bulletproof combos: 1)
'71 Demon 3100# 3.91 gears, 904 trans, 3000 stall.
360+.030" KB107 pistons, stock crank and rods.
J-heads, 2.02x1.60 valves, Crane springs& retainers. ZERO port work.
MP .528" solid cam kit, 273 pushrods&rockers.
TorkerII, later Perf RPM Air Gap intake, 750 AED DP. 6400rpm shift point.
1 5/8" Hedman Hedders, 2.5" exhaust w/FlowTec Afterburner mufflers. 12.50s@109mph in the heat. 17" vacuum at idle, drive anywhere, loved it!
2)
'67 Coronet 3600# 3.91 gears, 727 trans, 2300 stall (stock 318/727 hi-stall from a D-250).
Junkyard '71 Imperial 440, freshened but standard.
Stock 906 heads, Crane springs&retainers. ZERO port work.
Used MP .474" Hemi grind cam kit, stock rockers and pushrods.
Performer RPM intake, 750 Eddy carb. Hedman 1 3/4 Hedders, 2.5" exhaust with Flowmaster 40s. 12.50s @110+mph in the heat. Good manners, sounded mean and rock solid performance for the dollar. 5400rpm shift point, live forever!!!

RB

This is a great topic,I am putting together a 68 440 for my 65 Coronet,my plans are for,
68 440 block that has already been bored .40
used MP 509 cam
cast flat top pistons
fresh stock 906 heads with good springs
Melling pump and a windage tray
10" street fighter
SS springs and 391's

Any advice on a carb,intake and ignition setup would be greatly appreciated.

mine weighs 3430 I have a 1978 std bore 360 that I put kb flattops in and R&R'd the stock heads - 1.88 intake valves and all.

even with a 200 dollar mopar 2500 converter I was 12.80 @ 108 with the 3.23 gears out back and a 26" tall slick

went to a dynamic converter, 24.5" tall slick and it goes 12.56@ 106

aside from the KB pistons it's a stock rebuild, and a mopar 474 lift cam


If i can go 12.50's with 3.23's and a stocker 360 you should be in the 11's with a big block...

The 72 runs high 12's with a 360.

Motor started out as a MP crate engine then had OOTB eddy heads an a vodoo cam installed.

Trans is a stock 727 with a TCI VB and 11" conv. Running 3.91 gears and it weighs around 3400#'s

Could probably sneak a little more out of it if we were to go with something like the 10" Street fighter conv.

.060 over 383, 3 angle valve grind on mildly ported 516 heads, 9.4:1 comp., silvolite pistons & iron rings, MP484 cam, thermoquad. 3500lb 66 coronet station wagon. 4.43 gear, 3000rpm convertor. 12.50's @ 109mph

Hey Guys!

It took me a lot more money and parts to get into the 12s than most on here, but I will share anyway.

69 Super Bee 3950lbs (with me and a passenger on my best run)
383 - 11:1
3.91
3500 converter
232/242 solid cam
RPM intake + 750DP
Edelbrock Heads
1 7/8 headers

Ran 12.7 @ 109 on 28" ET Streets the only time I've been to the track with this combo.

Same combo minus the Edelbrock heads went 13.40s

My cheap combo
used .030 over 383 block that sat with water in the bores with rust pits
used flat top Kb pistons, stock rods and crank
70cc eddy heads
5200 converter with 4.88 gears
Car weighs 3240 with me in it
11.31 @ 117
oops you were looking for 12's sorry