I'm debating on which block to use for a stroker. Is it better to use a 400 or a 440 block? I have a set of 440 Source Heads (unported version) and a Mopar .590 cam that I'd like to use.
I do have a 440 intake, but it is an older Weiand 7512 (Rated for 3000-6500) and a Holley 850 DP. Pretty sure the carb will be to small and will have to get another one. I have both 400 and 440 blocks that would require the same amount of machine work. Engine will be strictly a race motor and wouldn't be turned more than 6500. Trying to get a 3200 lb car to go 10.20's.
Your probally going to need a better set of heads and a better cam to acheive your goals
How much compression and fuel are you planning on using?I'm in the middle of building a motor similar to your planned motor, 400 block bore to 4.375, 4.250 stroke with a set of unported Source heads, I've already told the customer we are probally going to need a better set of heads to reach his goal of 700 HP on Oregon 91 octane pump swill
I've built several different versions of race and pump gas Mopar stroker wedge motors, to reach 700 HP with 511 C.I. or larger C.I. motor you need a set of M.W. size ports that will flow at least 340 CFM at .700 lift on the intake side
It is all doable depending on how hard you want to work and how much money you want to spend
