torana434

Hi Guys, I am wanting to build a new set of headers for my 434 sbc and need some advice on what size I should go too.

Engine details are as follows:-

1000cfm Pro Systems 4150,
Edelbrock 2.9csa Intake manifold port matched,
Dart 18* Heads, 2.15 intake 1.6 exhaust, flow 355 @ .700 intake and 253 @ .700 exhaust
T @ D Shaft Rockers 1.6 intake and 1.55 Exhaust
Dart Little M block 4.155 bore, 9.010 deck height
JE Forged pistons part # 213107
Eagle 6" H Beam Rods ARP L19 Bolts
Eagle 4" 4340 crankshaft
Howard's roller camshaft part # 111233-10 Duration @ .050 278 intake 286 exhaust, lift at cam .450 intake .426 exhaust

Current Header is 1 7/8 primary 3 1/2 collector, car weighs 3140 lb with me in it, best 1/8th mile ET of 6.195 @ 110.4.

Thanks Dean