There's lots, actually.

crazy Turboed 261 (running on biogas maybe? in Spanish. Not sure what these guys are doing... pumping water? running a generator?)
http://www.youtube.com/watch?v=WC5Trh6YCtQ
http://www.youtube.com/watch?v=wlCzJj39cMM
http://www.youtube.com/watch?v=2gU6PC-_JU8

49 chev truck w/ updated 235, long video from multiple perspectives.
http://www.youtube.com/watch?v=xEH_kxHtVTw

62 235 in a 37 pickup. Open header.
driving:
http://www.youtube.com/watch?v=iZVEeLG8eI4
from outside (shows exhaust routing):
http://www.youtube.com/watch?v=XKTZ3DoiPhs

200 with tube header in 66 falcon.
driving:
http://www.youtube.com/watch?v=eXO_R8_E3dQ
behind car:
http://www.youtube.com/watch?v=LWuo3zOj_Cc

no info Model A (with zoomies and 3x2s, late chev 6?)
http://www.youtube.com/watch?v=GCgI6pJvG8g
http://www.youtube.com/watch?v=bM4fVQ3JaKQ

no info buick straight 6 (30s car, European plates?)
http://www.youtube.com/watch?v=GpHg4gw7ZxY

302 GMC
http://www.youtube.com/watch?v=kZPkYL8QdX0

250(?) with lots of mods (info included in link) in a 66 f-85. Sounds mean as hell.
http://www.youtube.com/watch?v=fx7xYOC011U

Stovebolt, 12 second HA/GR run. Wild.
http://www.youtube.com/watch?v=6eB3HpJB838

292(?) idle, rev on test stand.
http://www.youtube.com/watch?v=ChAhq7BQ1Qo

258 jeep with electric exhaust cutout
http://www.youtube.com/watch?v=UE4ZVqaOCFw

Trying to find a modified running a 153" or 151"...


1953 2dr 150 with '59 261
1964 Bel Air with stock ~69 230
1961 Biscayne with stuck 235
tore up '53 235