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Big block will get you there easier, at less RPM and with less "exotic" parts. Using the 400 block you have some stroker options 451/470/499/512. A relatively basic build with just about any aluminum head shouldn't have a problem cracking into the 10's

It can of course be done with a small block as well, but might require a couple extras, Ported heads vs Non ported Big block heads for example.

If I was in your shoes, first thing I would do would be make the car run and drive again with the 340 you already have. Good Luck!

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I was runnin solid 10.40`s w/a 470 and ported 906`s, solid cam and drove it everywhere. Easy to do and if I knew then what I know now, it would of been a lot faster. I`ll never own a small block again and torque is king IF you can hook it..........

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Big block will get you there easier, at less RPM and with less "exotic" parts. Using the 400 block you have some stroker options 451/470/499/512. A relatively basic build with just about any aluminum head shouldn't have a problem cracking into the 10's

It can of course be done with a small block as well, but might require a couple extras, Ported heads vs Non ported Big block heads for example.

If I was in your shoes, first thing I would do would be make the car run and drive again with the 340 you already have. Good Luck!

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I was runnin solid 10.40`s w/a 470 and ported 906`s, solid cam and drove it everywhere. Easy to do and if I knew then what I know now, it would of been a lot faster. I`ll never own a small block again and torque is king IF you can hook it..........

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Don't forget that if you want to run 10's you need aftermarket axles, trans blanket, sfi balancer, etc.

I would not modify such an original car that much. I would do the 360 build, caltracs and 9" slicks and keep the car above 11.50.

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This is true as I use an SFI balancer and run a trans blanket but I do still have stock axles. Now I only race about twice a year but I do need to upgrade my axles. I am glad my car is an auto because if it was a stick I am sure I would have broken an axle by now. And as said you will need at least a 5 point rollbar to race at the track. You dont have to tub it or even move the springs if you dont want as you can run easy 10's on a 9" slick but you can fit bigger then 9" slicks in the stock Demon wheewell. Tires today work good as cars out there are running 9's on 9" tires. And if you decide on the smallblock stroker you can leave the 340 emblems on it. Myself I used a bigblock because my car is a B-body and I wanted to keep some max wedge look but if its cheaper for you to stay with the smallblock stroker you will have no problem getting in the 10's with the right combo. I am impressed with how strong some of the smallblock Mopar strokers run. So whichever you use big or smallblock you can build a nice 10 second Demon with the right well built and though out combo. Good luck and post pics as you build it as I really like Demons. Ron

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I have owned my 1972 340 Demon since my senior year in high school that was 1979.

340 0.030 (original block) #matching

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If a track will not let you run because of the roll cage then go to one that will let you run!Tomorrow (Sat.night) @ Lagrange Ga Drag Strip they are having there monthly No Bars Race(that means any kind of roll cage not even a 4-point allowed), No tube chassis(back half cars with no roll cage allowed),No wheelie bars anything else goes Heads-Up Class!I'll give you a Hint if you can't run 5.0 in the 1/8 mile or Faster you best not go.Also it will be Grudge Race night,the place will be packed.

If your Local wanna be Big NHRA track will not let you race,go to a non NHRA track(there are more of them)that will Welcome you to come Race!

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Even our no brand tracks here wont let you go much
past the 11.50.. sure they might let you hit 11.20
but thats about it... they WILL ask you to slow down
or leave... I know this for FACT.. when I've gone
with my buddy he has been asked to leave or slow down
on multiple occasions

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I have owned my 1972 340 Demon since my senior year in high school that was 1979.

340 0.030 (original block) #matching

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Original 72 340 Demons do not grow on trees , especially with their original number matching block. I would not put nitrous or a supercharger on that motor unless you don't care about the original block.

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Yes I understand this aspect of this car. I have had this car for so long and gone back and forth that when I have the money after my kids are grown and on their own.

Should I reurn it to stock. <-- dont plan on selling it

Make it look somewhat stock (interior, paint, keep my old centerlines) but with a hot 340/416. <-- improve it as it sits

Go part race car with roll bar gutted interior race seats big block no body mods. <---really what I want to do but my gut tells no

One reason I suggested a 360 stroker instead of my 340 was if i wanted it back original it could be done.

I guess im still not sure the direction.

I have also thought of finding a slant 6 or 318 demon and making it a racer with no worries. money permitting and wife

Im not a guy with extra cash laying around so whatever I do will be a one shot deal. The wife doesnt understand the car thing even though she has put up with a spot taken in the garage from the day we were married.

sidenote
I wish I also kept the 1970 340 4-Speed Panther pink Duster
and the 1971 340 Duster auto, special ordered very well optioned
got both of these around 1983-4 ended up dumping them for school tution end my hopes of a profesional car collector

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I have owned my 1972 340 Demon since my senior year in high school that was 1979.

340 0.030 (original block) #matching

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Original 72 340 Demons do not grow on trees , especially with their original number matching block. I would not put nitrous or a supercharger on that motor unless you don't care about the original block.

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Yes I understand this aspect of this car. I have had this car for so long and gone back and forth that when I have the money after my kids are grown and on their own.

Should I reurn it to stock. <-- dont plan on selling it

Make it look somewhat stock (interior, paint, keep my old centerlines) but with a hot 340/416. <-- improve it as it sits

Go part race car with roll bar gutted interior race seats big block no body mods. <---really what I want to do but my gut tells no

One reason I suggested a 360 stroker instead of my 340 was if i wanted it back original it could be done.

I guess im still not sure the direction.

I have also thought of finding a slant 6 or 318 demon and making it a racer with no worries. money permitting and wife

Im not a guy with extra cash laying around so whatever I do will be a one shot deal. The wife doesnt understand the car thing even though she has put up with a spot taken in the garage from the day we were married.

sidenote
I wish I also kept the 1970 340 4-Speed Panther pink Duster
and the 1971 340 Duster auto, special ordered very well optioned
got both of these around 1983-4 ended up dumping them for school tution end my hopes of a profesional car collector

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Even with a 4" crank with what you got and on pump gas, would get you low 11s.
Build a 360/408 short block on the side and enjoy the car in the mean time.
When the short block is done, put your existing top end on. Go run low 11's with what you have.
When time and $ allow, get some good heads 300cfm and stuff in a [Email]256@050[/Email] .650 solid roller and go run mid 10s.
At this point the rest of your drivetrain will also need attention.

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