340 General Rebuild Info- Cam Recommendations

abdywgn,
Greetings!
I have yet to discern all the detail of this Demon. It is a 71 model, plain as Jane 4spd car! Bench seat to boot! It appears to have been rebuilt back in the early to mid 70's when the prev owner bought the car to drive in high school......and it hasn't been touched mechanically since! Still has stock carb, valve covers and air cleaner! No headers. The clutch is absolute toast and is awaiting replacement after I can get my lift installed. I've decided against changing cast iron gear boxes on my back......used to do Ford toploaders that way, but now T-5's are as much as I want to try and hurt myself with!!!! Getting old is a bugger! It has a 3.23 posi I believe....will confirm it all once it is up in the air! Can hardly wait.

What bothers me about the last post I was reading, which was a 318 cam test with extrapolation to a 340 suggested.... but the numbers, HP and TQ, which I presume were crank numbers, were much less than what I experienced with a 331 SBF build that I did for a mid engined car. Roller cam, .530ish lift max, alloy Ford Racing heads (65ish cc chambers on flat tops), about 10.5cr, ported heads to match a Performer RPM and headers, with a puny 570CFM Avenger carb. I was getting about 320HP at 3500 or so, and 305TQ at 4500 or so..... A good low RPM fun to drive power plant! It had manners.

Your engine sounds more like what this SBF was..........so I was glad to read your experience! It surely seems like the intake ports are more than capable, exhaust, not sure yet, but everything else I've read said that the intake lacked nothing! Except a diet! :) I was looking to find some apples and apples to compare!

MP Guide???? Not familiar with this yet.....

Funny you should mention a 351C....that could be one of my next projects if it isn't worn out.....working on swapping some projects. I don't like the 347's so much due to the shortness of the pistons and the rings in the wrist pins...... 331 had a little of the latter but taller slugs for more stability. If I could get the heads (may actually be Edelbrocks....) again, and a similar cam, I could be persuaded to put it in place of the Cleveland! It was that sweet!!!! Or maybe a roller 351W....... SO many engines so little time!

Thanks again!
STeve