[jmarsey]

Simon,

The motor requirements you are describing are easy to achieve with a 331. Use a good set of heads and you'll be in the 400 - 425 hp area and torque in the same range. Keep your cr around 10:1. The 331 is a very good combination in terms of endurance and power from a short stroke motor. You'll be surprised.

I'm not an engine builder and my build specs won't be of much help to you. My recommendation is that you find a engine builder who can help you through the basic steps and keep you out of trouble. If you buy your parts through a speed shop / engine builder, spend money at their store, they may help you with advice, assistance and necessary machine work. Good advice goes a long way.

Questions you need to know for engine set up and cam selection are: how do you intend to use your car, street, track, other, will you be cruising for long periods, cars total weight, gear ratios as well as final drive ratio and rear wheel circumference.

JE pistons are very good. With a 5.4" rod and your windsor heads, JE should have what you need on the shelf. Once you get your complete rotating assembly, crank, rods, pistons, flywheel and damper, have it balanced. Also make sure end play and rod side clearances are correct for your application.

Take your time and do it right the first time. You will have a sweet little motor.

John Maresy