Tri Power a '77 Chevy 454

[ekneen]

I'm currently working on my mutt of a 1969 K10 running a 1977 454. In the carb category, I have the quadrajet it came with that could use a good rebuilding and on the other hand a GM header and holley tri-power carb off of a '69 Corvette 427.

Anyone here have experience running a tri-power on a big block? Thoughts on tri-power vs q-jet? Given the truck is a mutt I could care less about numbers matching, stock, etc.

[andrewmp6]

If its a daily driver i would run one carb sized to the needs of the engine,If its a more a toy i would run 2 4 barrels on a tunnel ram if you got the room.

[77 ChevySport]

Originally Posted by ekneen

I'm currently working on my mutt of a 1969 K10 running a 1977 454. In the carb category, I have the quadrajet it came with that could use a good rebuilding and on the other hand a GM header and holley tri-power carb off of a '69 Corvette 427.

Anyone here have experience running a tri-power on a big block? Thoughts on tri-power vs q-jet? Given the truck is a mutt I could care less about numbers matching, stock, etc.

ekneen:Just a word of caution>67-69 3x2 Int. Manifolds came 2 ways. Round Ports(Which I suspect you got) and Rectingular Ports for the High Horse engines which will not work with your heads. I would keep the Quadrajet for drivablity and less leaks. (All Holleys leak in good time)JMHO-Larry

[truckin 79]

I read a article a long time ago that tested 4 barrel vs tripower and the 4 barrel out performed the tripower every time. Tripower is the coolest looking set up IMO but for less headache a 4 barrel is the way to go.

[Tom]

tri-power on a 4wd?

[ekneen]

Originally Posted by 77 ChevySport

ekneen:Just a word of caution>67-69 3x2 Int. Manifolds came 2 ways. Round Ports(Which I suspect you got) and Rectingular Ports for the High Horse engines which will not work with your heads. I would keep the Quadrajet for drivablity and less leaks. (All Holleys leak in good time)JMHO-Larry

Thanks for the word of caution. I should have started there. Port mismatch indeed. Qjet it is!

[slotard]

I don't know how much a stock smog dog truck engine would take advantage of that much carb either. I'd much rather have a tiny bit less potential but easy to start and tune than a race engine in a truck.

[1968vetL-71]

If I read that right u only have 1 tri-power carb?
If that's the case, u will not like buying the other 2 and the intake. Better off selling it in eBay to a corvette guy and staying with the 4bl.

A 67-69 L-68 or L-71 tri-power setup when tuned correctly is a thing of beauty. Problem is guys back in the day didn't know how to tune properly and most setups were removed in favor of a simplified 4 barrel.