sadly.... the 1973 340 uses a balancer... that nobody has in Stock.... also aftermarket balancers are not availible...... as far as I know....
Greetings Juergen
Professional Products make a balancer that comes with 3 additional weights that bolt onto the inside of the balancer...one of the weighs is for a cast crank 340....so there is something out there....they come in two flavors...Street version and a SFI version...
ALL 360 are externally balanced.....but the LA and the Magnum are not the same and the balancers cannot be interchanged...the Magnum use less external weight....
