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Mark Howes is the fastest high compression 340 and there are only two guys running the big valve high compression combos.





Have you looked at the HP on that engine lately??? 290hp less than a low comp small valve 360 in GT..........

But if you want to put together a lower budget SS engine the 360 is the way to go.........





I know it well, 340 high compression big valve is rated at 279 this year it was 283.
I run 71 340 high compression with magnum heads rated at 288.




I knew it had hp taken away this year..... again...... Would love to go that route for my 69...... i'm putting together a mag head 360 combo for GT........

how far under are you?? Why don't you like it??