Cruise friendly low 12's with a 340 Dart

68 HEMI GTS said

can't beat a six pack for gas milage, also run an adjustable vacuum advance. i'd build atleast a 360, around 10.5-11:1 with aluminum heads (so you can get away with pump gas).

i'd probably build up a 518 w/ OD so you can run a 4:10 gear, that way you can still cruise. thats probably how i would go about it.

Click to expand...

A 6pac is a great idea, but he has a budget that will not allow it.

The 360 is a great idea IMO. I did a zero deck pistoned 360 with Edelbrock heads. This is a great combo and the OOTB heads on this set up was dynamite. A decent sized cam ws used and it helped alot in the builds target.

If the OE poster can do this with a 4 inch crank......... It'll be a beautiful thing. The price difference in the build is really only the crank price and possible block clearance grinding. Worth it IMO.

68 HEMI GTS
I have a question for you. Have you put a 518 in an A body before?
I ask because I have seen the 904 O.D. version go in with the use of a hammer for minor clearances. How about the 518?