I've had a pleasant surprise while buying parts for my 425 Caddy engine on ebay. I bought a bunch of stuff just because it was so cheap. i.e., I've spent just over $1000 on the swap, and a bunch of that was just shinny bits and nice to replace items. ( all prices include shipping, except engine which Lee d. picked up for me.)
Caddy engine/400 trans $510 used New Chrome valve covers $35 New fuel pump $30 Timing chain set $26.00 Caddy Book $20.00 rebuilt Starter $60.00 used, earlier Hei dist. $36.00 Rebuilt carb $60.00 New chrome alternator $89.00 Rebuilt Water pump $30.00 Hurst/adapter mounts $35 oil/filter $9.00 (Flaps) EGR block off plate $16.00 HEI plug wires $27.00 Chrome air cleaner $32.00 Trans cooler $45.00 Timing Gasket set $17.00 (Flaps) AT Cooling Lines $14.00 (Flaps) Thermostat @ Gasket $5.40 (Flaps)