horsepower estimates.

Its hard to determine HP without using a dyno, but is there a way to get close figures. I got a 72 360 LA bored 4.040 with stock stroke eagle crankshaft, using eagle I beam rods and mahle forged flat top pistons. Chart on the pistons showed 10.5 with 63 cc heads. The block had about .003 taken off just to get it trued up on all the bores. I installed edelbrock rpm performer heads with 63 cc chambers using .039 head gasket with rpm air gap intake. NO porting done. Comp hydro cam with duration 244@ 50 degrees on intake and exhaust. .501 LIFT intake and exhaust. Running comp rockers 5.1 ratio. TTI 5/8"- 3/4" STEP HEADERS. open exhaust, strip only. Small crank pulley with alt belt only. Running electric water pump. I am wanting to order a converter and I know they will ask some questions. Car weighs 2,740 minus driver, 2,920 my weight included. 4.10 GEAR 10" WIDE 26" tall tires. Running a cope racing transmission with manual rear band apply valve body and steel billet front drum.