Your car was moving fast because of it's light weight.
You would only need about a 300 horse engine to go mid to low 12's and that's what your car was doing with the 318.
Two big improvements would be a way bigger carb.
Try to sell the smaller holley 650 and put the rest of your money in a good hp 950 cfm holley or 1050 crm dominator hp carb.
Secondly i would go with a victor single plain intake.
As far as the cam goes, you would need to know what the head flow #'s are.
BUT...............................
This is one of those situations that everything might be matched up perfect with your engine but the car is going to need a ton of attention.
You might have hooked up before with the stock converter and a cam that was way to big because the car DID NOT MAKE MUCH TORQUE, and moved nice and smooth out of the hole on the starting line because of it.
Your installing a stoker in a very small car and will have a ton of torque.
I hope you have wheelie bars, cause i think you might need them.
Maybe you won't, but i would definitely talk to as many people as possible that run anglia's at a drag strip to understand how they react with certain engines and power levels.
You might have wheelie bars all ready and have a good understanding of the vehicle and it's problems ----- and if that's the case then forget what i just said.
Good luck with the heads and pick your cam last based on the end result of the heads and the work being done.
That 3500 converter might stall at a lower rpm due to the light weight car.
What kind of converter is it???????