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So you think a 340 Mopar can't be quick with OEM heads?

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7.3K views 33 replies 21 participants last post by  cheapstreetduster  
#1 · (Edited)
#9 · (Edited)
On the contrary.... I love this shit! So much more interesting with factory iron heads. Anyone can go fast with an all aftermarket engine.
I agree. I had a 440ci mopar myself years ago. I think i paid under 1k for it with 727 as a good runner. Factory forged steel crank 1968 motor. I had the block dipped and the bores were so good i just had it honed 5 thousands and i reused the stock pistons that the machine shop cut valve reliefs in for me. New rings and i had the stock rods prepped and resized with arp bolts fitted. I drilled the mains oil feed holes larger. I assembled it myself with new bearings, machined stock steel crank and reused the stock balancer. Fitted 590' mopar purple solid cam. Max ported 906's (no welding or epoxy) with big milodon valves. Crane gold rockers and 3/8 pushrods. 850 holley dp, ported team g intake. Custom 2" headers. 7AL2 igniton. Most of the money i spent on it was outside of the engine. It was a very cheap build by today's standards. I kept the 727 as it was and just fitted a turbo action rmvb and new filter, adjusted the band. It worked like a champ.

I had it crammed it in a mini-tubbed early a-body with an 8 3/4 rear axle. It also had a glass hood and lightweight seats. I never raced it but it had to be 600hp and it was a light car and i remember it would just eat an entire stretch of road like a mofo and i didn't have one car beat me on the street at the time. It also sounded mean as hell and the torque from a roll was a blast.

If i had that car back today as it was i'd definitely keep it. Might not be that fast by todays standards with all the turbo cars going around, but it was a fun car for cheap 20 years ago. I sold the engine and he went high 8's with it in a rail car. And i put a stock 318 back in the car and sold it for 5k and at the time i thought it was good money.

If LS's hadn't come along where you can make 550hp from a simple cam and cnc heads SBE 5.7 ls1, and much more from the LS3 and then the LS7, and 800+hp with a single turbo, those old mopars were hard to beat for using mostly standard parts. The small block Mopars were definitely no slouch either but the 440ci was definitely more fun on the street from a roll and they didn't need as much converter to get moving. All i had was a tci streetfighter and wherever you hit the throttle from the car would just disappear. Mopar knew what they were doing with those little wedge ports for a street car. Less is sometimes more.

To the Ford nut huggers on here who think a 351c is all that and the mopars couldn't get out of their own way with OEM heads.. you are delusional ;)
 
#27 ·
SBM with factory iron heads and boost works alright for my junk.
It’s not all that quick at 4,000 lbs - 1.43 best 60’ for it, but it’s still a hoot getting on the freeway under full steam.

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#31 ·
mine is a 368" small block with OEM iron heads.. runs 6.54 (though not in this video)
it weighs 3310. and has a small .485 solid lifter cam in it when this video was shot.. its been a few yrs ago now.
it ran 10.31 at ATCO sea level... here in Ga. its about 3300 ft elev.

 
#33 ·
used to be a guy from the South Hills of Pittsburgh who had a black '71 Cuda,kinda resembled the Phantasm car.

340 with an automatic,few of us took cars to Quaker City one weekend and with slicks and nothing else.. that car ran 11.2 all day.

was one of the faster cars around back early 80's.

I always respected the 340 cars.