Help me build my SB Stroker
I have been wanting to build a SB stroker motor for my 69 Barracuda notch for some time now. I am pretty sure I have my other project car sold, so this winter I want to concentrate on building my new motor and having it in my car for early spring. My car is currently a mild 340, stock x heads, TRW 10.5:1 pistons, MP 509 cam (way too big for this motor), FBO Ignition, dented headers of unknown brand, Edelbrock 750 carb, LD340 intake. It is a 4-speed car with an 8 ¾ rear fitted with a 3.91 sure grip. Right now the rear tires are 235/60s at 26 tall. I will be changing these to 255/60s which will get me to 27 I think.
I am assuming that I will reuse my ignition, pulleys, accessories, starter, tranny, rear, etc but everything else will change.
The car will be a street car with minimal track time. Some trips down the track during local street-fight nights, but this is NOT a bracket car. I would like a motor with gobs of torque and nice street manners. If I could get my car to run low 12s ON PUMP GAS I would be really happy.
Since I have been wanting to do this for a while, I have been gathering parts so here is what I have:
1971 Model 360 block @ standard bore It has rust in one cylinder but I am thinking that it will clean up at .060 over. Since these are supposed to be thick walled blocks, I was thinking about using .030 over 340 pistons at 4.070. I will use whatever the minimal clean up takes. If I go to 4.070 I will have it sonic tested.
MP cast 4" Stroker 360 crank
Eagle H beam rods
Edelbrock Heads. These heads have had major porting done to them. I do not know what they flow but I was told 290cfm on the intake at .600 lift. I would like to have them flowed. Do we have any members that have a machine shop that can flow heads?
The first question I have is about pistons. Should I use dish pistons or a set of flat tops? I know about quench and the effects it has on a motor and I want to be in about the .040 to .060 piston top to head range for good quench. I want this to be a PUMP GAS motor so CR is my question. What is the highest CR I can get by with on PUMP gas and aluminum heads. I realize this has to do with cam overlap / duration, weight of car and a whole lot of other things but what static would you recommend? So my first set of questions is:
Flat tops or dish pistons and why?
What brand would you recommend?
What static Compression ratio would you shoot for?
I would love to run a hydraulic roller cam but due to the cost of lifter and the cam, I will probably be limited to a hydraulic flat tapped or solid.
For a 408-416 ish cubic inch STREET motor, what cam would you recommend?
As for intake and carb, I was thinking of RPM Air Gap and 950HP Holley. For headers, I am assuming that the best I can do are TTI steps?
Give me your opinions on this build and any info on my questions above
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Thanks in advance