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Thread: Mopar 340 or 426
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03-11-2016 #1Registered User
- Join Date
- Mar 2016
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Mopar 340 or 426
Hey all,
I have a 1973 Cuda which is getting a full suspension upgrade. Corvette C6 front end arms,spindles, ridetech coilovers. Rear torque arm setup. Corvette C6 brake rotors with Wilwood calipers etc etc etc.
The car has a numbers original 340 which would require a rebuild, bit its certainly in good condition.
I also have a 426 Hemi Aluminum Indy block, stage V aluminum heads, roller hyd cam, roller rockers, stroker crank (472). All the good stuff. Brand new.
Whichever I use it will be running an aftermarket EFI system with multipoint sequential injection and ignition. I already have this sitting on the shelf.
Transmission I have is a T56 M12 close ratio 6 speed. I dont have a bell housing yet for either engine.
Plan is to set the engine further back and recess the firewall for better weight distribution.
The 340 gives me that "original number" feeling, It would run alloy heads so it probably has a weight advantage over the Hemi. Also located weight slightly further back.
The Hemi certainly comes with ample grunt but adds a lot more weight to the front end and moves the weight further forward. Worse fuel economy (but with EFI it may not be too bad ? ).
Both motors would be pretty mild with an emphasis on response and torque not heaps of revs.
Just putting the feelers out for some feedback on which motor I should run. I wont drag the car, its being built for hillclimb and autocross.