The roller cam block, in my opinion is a must regardless of who the builder is. The "vortec" heads would be very high on my wish list. Price a long block (short block and heads), then complete engine with used intake, carb, dist, etc to stay within budget. Water pump should be new. Ask the local engine rebuilders to price a long block with roller block and vortec heads. See if this would help with budget limits. As for the 327; a 350 can be built cheaper than a 327 and you can have the roller cam. The flat tappet cam is the Achilles heal of the sbc. Break in is so critical with them. The engine by the local builder with the 200 cc intake runner heads, 9.5:1 compression and the thumper cam may not be the most streetable combination. 175 cc runners, 9.5:1, and 215/225 @ .050 would be my choice to start at with your budget. As for the 2200 stall, GM used a 2500 stall in their factory Vettes. Why the high volume pump? 400 hp and a small budget may not fit well in your case. Just my opinion. Others may disagree.