I bought a crashed 1974 Charger SE with a 360 4bbl that was rated at the 245 HP. It was a nice car, faster than many cars in the early 80's. But the trunk was like an AMC Gremlin, smashed flat and up by a Cab over Peterbuilt. It had 22,000 miles on it. We pulled everything and sent the body off to make 4 Toyotas. We put that 360 on a dyno and after doing some tuning, no AC belt, iron ex manifolds into the 2.5 dyno pipes... we had 335 gross HP at the flywheel. Dyno was done in Spanaways WA at Cope Brothers, ie Derik Cope of NASCAR fame. We put a 272 degree Luniti cam in and got 1 HP per cube, 362 HP Gross
The Eh1 (almost exaclly a E58 spec) 360 in the Little Red Express is basically a 1972 up 340 with 20 more cubes. They factory rated them at 225 NET HP. ????
Same X head, 1.78" valve sizes, almost same cam spec, almost same compression ratios as the 72 340 with 240 HP NET. The LRT 360 would be, at a guess, around 255 HP NET
318 = Shetland Pony HP
340 = Quarter Horse HP
360 = Clydesdale HP