Juan, the stock GT40P springs are pretty weak. The cam is going to depend on what you want. While the stock cam is pretty mild, it's meant to get a heavy truck moving so it makes a lot of torque where you generally drive. For an everyday driver it would probably work pretty well. I have a Mustang cam in mine. the big difference is more intake duration and lift. I also have a set of Crane 1.72 roller rocker arms. These will give a little more lift and duration. over all it's a very nice set up. It makes really good power and idles great. No bad manners.
Here's where I bought my springs, I have the .540" springs https://www.alexsparts.com/categorie...E-SPRING-KITS/
I havent decided yet what to do about cam... I was thinking for now leaving the existing cam and springs and later change them, mainly because the $$$ as I ended up dissasembly the whole engine (not planned), and need to spend there... But of course, I also think that is now the moment of put the final setup, as I have the engine all tored apart... Well see what my machine shop says, as maby there is no need for spending a lot of cash there, as the engine has minimal wear, just the damage of the water in the #1 and #2 cylinders, that is also minimal... Hope next week have news from them. I will also continue purchasing the missing parts, next will be the damper and flywheel, Whis this parts, the only one missing is going to be the carb.
I will report the machine shop news
About the car, I´m waiting for the new hood I ordered a couple of month back, hope to receive it in this days.
Then I will take it to the body shop, to change the whole cowl assembly and adjust all the front sheet metal, with the new hood/cowl. Also the plan is to get the engine bay ready (stripped, repaired as needed and painted semi gloss black) as I want to put the engine on the car, when is ready.. Easy to say, let´s see how I go...
I´m adding a couple of pics of the car, as Is now.
I have this car since I was 18, I remove the 6 cylinders like 3 years ago to rebuild and well... one thing led to another and I ended up tore it apart... I´going to paint it red and putting black interior...
Greetings from Uruguay