BBC - Advice required

[*rayman*]

My 68 Camaro is nearing completion, and with the way the Aussie Dollar is at the moment I should take advantage of this opportunity to puchase some performance goodies for my motor.

I'm looking to improve the performance of the motor a bit, and have considered the following options within my current budget. The motor is currently an standard bottom end 454, oval port heads, edelbrock dual plane intake, unknown cam type, tri-y extractors, high torque starter, weiand team-g water pump, alloy radiator, B & M gear drive, Romac hi-perf balancer. I don't have exhaust system run yet. I'm considering twin 3" if i go the procharger route, or twin 2 1/2 if i go N/A.

1) Purchase alloy head / intake manifold package - I'm not sure what size and brand to go with for a mild street combo. What size chamber / runners should i go for with my type of use? Edelbrock seem quite cheap in comparison to everything else. I want to retain stock exhaust port height so that i dont have problems with my extractors not fitting up etc.

2) Purchase pro-charger F1-SC series package direct from ATI - This looks really attractive to me, but how well will this perform with a set of oval port heads?

Will I have nightmares with the carby trying to get it running well with the pro-charger setup?

I would be getting a lot of weight off the front end by replacing the iron heads with alloys.

Thanks guys, I've had a fair bit of experience with small block ford stuff, but am pretty new to Big block chev stuff. I just want to make sure I spend my money wisely, as i dont have a massive budget.