k I think i'm in. New member here, have a 67 dart 440 car, altercation relocation kit in front with manual rack & pinion steering, 727 tranny with 3500 stall, mini tubs with cal split mono leaf in rear on a dana 60 with 410 gears. aquired a un molested 400 block want to build a 512, would like to make min of 650 hp.I'm told that if I use max port 270 heads that it might not fit under the hood due to poor intake selection. The car has a fiberglass hood with a 4" hemi scope. I'm not sure if using the 240heads I can get into that hp ,the car is 98% street driven, but it makes it to the trac a couple times a year. It has ran 11.40 at mission track in BC. Pump gas motor also. Any body out there have some insight for me PLEASE!!!!