Not mine but strong sb

Yes a built 340...... with a 4" crank in it.
I would not say it is critical someone else on here has mentioned why over build your car but I have learned the hard way many times over, under building things just causes destruction I’ve been building this car since I was 16 and I am now 55 and I haven’t had to spend a dime on repairing broken **** in five years all I’ve done is oil changes oh yeah and of course have to keep replacing the tires