Hi Joe,
Welcome to the forum.
Clifford's parts are OK, the Q.C., not so good.
If you could , tell us here what your goals are for your Ventura?
Street only car, track car, Both?
Is gas mileage a concern?
Weight of vehicle. Axle ratio. Auto trans, manual?
Every day driver, weekend car?
Best bang for your buck mods?
Turbo, blower.
Do you need to pass a smog check?
For a 4 BBl install, I like this intake, but it's pricey.
http://www.ebay.com/itm/161462168269?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
I would go forced induction, if, you want to be really pleased with the output.
I tried all sorts of combination of intake manifolds & carbs., different cams,, etc, etc, was never really completely satisfied,, The Clifford side draft manifold, & 3 DCOE Webers was really good for a naturally aspirated engine, but I also had 12:1 compression.
Best intake naturally aspirated for a street car, no EFI, Side draft Webers.
The straighter the shot to the intake port is better, sharp abrupt 90 degree turns,,, not so good.
MBHD
