the cubes stay at 351 yes. This engine is set up for efficency. the longer rod keeps the piston in the combustion chamber longer = a hotter, more complete burn.
This is not set up for peek numbers. This set up will give you a VERY broad tq curve...much like many cubes will do. This just gives you a way a keeping good fuel economy as well...kinda like having your cake and eating it to. It is very streetable.
I am using a custom cam...but you can call Crane and get one very similar. I will be using TFS "High Port" heads. You can go smaller...but I want room to grow.
The only one I have ever seen run used GT40P heads...and he had the flywheel power at 387 and 428 tq...those heads are wicked velocity.
I will be running an Air Gap intake and a 650 vacumn secondary carb for street...with a 800 double pumper for track...
This engine is set up to make great power with limited heads...and even more with big heads...
just a suggestion!
86 Mustang GT Convertible - 351w
89 Mustang Coupe - blown 331/6 speed