About 5 years ago I built a pretty stock 455 pump gas engine for my Judge.455,9.5C,completely stock 48 heads except springs and 1 pc valves.I used a XE276HR on a 110 as I had it in my drawer.We ran a stock AL SD intake with Joe Shermans dyno carb and custom 2in Tyree 4 tube headers.The engine made 432 HP at 5200.That cam was
[email protected] ran 1.65 H&S rockers.I put Daves new Stump Puller II in the engine with exact same intake and carb put replaced the 1.65s with 1.50s to keep the lift virtually the same.Because I wanted to know the performance as it will be in the car I used long branch 2 1/4 exhaust to about 2 ft of 2 1/2 pipe into Joes dyno mufflers.The engine made virtually the same HP 234 but at 5400.Joe figures we gave up about 15-20 HP with exhaust from the 4 tubes.We also ran no spacers as I cant run one with the 69 T/A RA pans.This cam was on a 112 put in at 107.He is going to pump it.FWIW,Tom