I got this project happening as we speak, been on the go for about a year now, had alot of set back this year so hope to complete it late next year.

I can tell you what it has cost me to date and what my projected costs will be. (not to stir any feathers, just being a realist)

Head - $100 from wreckers with other useful parts.
Headwork (optional) - $1100, porting, valve work, flowing.
Duplex sprockets - $60
Camshafts - $500, custom 'one offs' from Wade.
Drysump set up - $2000 (about)
External water pump $200
Inlet manifold - $165
Throttle Bodies set up - $1100


Still to pay for,

ECU - Haven't decided on one yet (currently using Haltech)
Custom head gasket - $300
Head studs - $300
Coilpack - $400
Other stuff - $400, hoses, leads, etc.

I have a pretty good machine shop under my house so obviously I won't be paying for machining costs.

If I think of any other costs I will update.

The plan is to use my wet sleeve 1860cc bottom end with the twin cam head.

Pretty sure the GA option can be used with a fairly standard A-series bottom end.