Lift | Int. | Exh. |
100 | 65 | 59 |
200 | 113 | 100 |
300 | 164 | 140 |
400 | 214 | 160 |
500 | 245 | 168 |
550 | 254 | 169 |
600 | 259 | 170 |
650 | 261 | 169 |
These heads will accept all factory bracketery and accessories designed for 289-351W and mustangs GT40 and more!!engines. Standard headers and intakes will fit fine, no smog ports on rear of heads. These heads have 1/2 inch head bolts so they can be used on 302 and 351 windor engines and more. heads are drilled and tapped for 7/16 screw in studs, we recommend screw in studs, guide plates and roller rockers which we have all listed, Autolite 3924 plugs work.Over the past 2 years we have sold over 6000 sets of these heads. During this time we have had a great deal of feedback from our customers, these heads have proven to be street tough and race durable.Thanks for looking.