my wc engine build-is it enough?

Plan on pulling in a 3 mph 4000lb. class . I have a 45 crank, nos allis d17 pistons sleeves, 45 carb with 175 venturi, heavy gov spring, head is at speed shop being rebuilt, vinson manifold. I am running 28 inch wheels to start and see what happens. I think I basically have built a d17 engine, 50-55 hp? Do you think thats enough for this class? We have a very sticky track, do you think it will pull with 38 inch wheels?

I have a wd-45 that i pull, I have not touched the internals ot the engine so I am un aware of what has been done. I have done some other modifications to make it turn 2300rpm. It turns 45hp on the dyno but will out pull dads that turns 47 on the dyno. I have a set of 15.5-38s that i custom built for it it will handle them fine on a softer track, but on a good clay track there too much. I usually have my 14.9-26 (yes combine wheels) on it and it will trip the 3mph horn on the sled. My little sister has a wd45 with 14.9-28s with stock rpms and mine with shorter tires will out run it. Her's will not trip the 3mph horn wide open.

Sounds good to me what kind of camshaft are you running in it?

I was going to have Barney cut my cam but he couldnt provide me with the lifter resurface that I was wanting when my cam was cut. I had Barry Cam service cut my camshaft, I had it done 3 years ago and it only cost I beleive 300 with the lifter resurface. Barney wanted 300 to cut the cam and no lifters. Nothing against the guy I spoke with him about it, and I just decided to go the other route.  Everybody says he knows his AC camshafts but at the time I was the builder on a budget so I went with the Barry grind and have been satisfied for 3 years. Pankley seems to know alot about Barney maybe you should get in touch with him. I beleive the 170 or 175 camshaft is a good cam to run also, alot of people tryed to get me to do that when I was building my engine. I couldnt find one at the time so I just had my cam ground. Are the D-17 pistons dished or the flat tops?