Thanks Big Dave I have just heard from other that its a problem on the 70 because of the placement on the upper part of the frame instead of down further like most other cars. It seems to be directly down from the middle 2 exhaust ports. My car is a factory 350 car and all I hve done was take the old engine out and build up below and add it.
02 vortec block 30 over hyper flat tops arp throughout, coated bearings, and all balanced and blueprinted compression 10.1 to 1
AFR 195 eliminator comp heads, port matched eddy performer rpm air gap with 1 in spacer
Mike jones custom speced jones cam hyd roller with jones roller lifters .228/.228 dur .580/.545 lift 108 lobe sep, 105 center 1.6 roller rockers, 5/16 .080 wall hardened pushrods, roller chain,
Quick Fuel 680 VS carb with GM HEI with MSD cap, rotor, coil, 8.5 wires, crane adjustable vac can set at 10 degrees connected to manny vac and NGK plugs. Inital is set at 18 degrees and 16 degrees mech in dist with screw stop mod.
exhaust is mandrel bent 2.5 dual with x-pipe out magnaflow mufflers and right now its using rams horns with 2 in outlet tht have 2 in pipes connecting to the 2.5 in until I find some headers but I know this has got to be choking it some.
I have 2 transmissions trying to decide which to use both built and ready 700r4 and a turbo 350 but i hear pros and cons for both. I have a custom stall being made as well tht will do great for a daily
have 2 sets of gears depending on which trans I go with 700r4 was gunna do a 3.73 gear and posi, turbo 350 is a 3.42 and posi
So was just looking for anyone thts already done headers on a 70 with a sbc and had no probs and what kind they used tht was all.