[D13]

The picture shows a separate intake (silver) bolted to the head (dirty brown). An integral will have one solid casting carb to head, not a bolt on like the one shown.

No 4bbl fits the factory. The only factory 2bbl is on an integrated. All the others , including early integrateds, are 1bbl.

These motors are not drag race machines. They are extremely reliable and relatively cheap to operate. I have had 2 go over 200,000 miles with nothing other than oil changes and spark plugs. One went 425,000 miles without the head or pan off. (I must admit that at the end it was eating a quart of oil every 50 miles, only 1/3 of which was leaking). They are not hipo monsters.

If the budget is tight and you're not especially mechanical the cheapest route is to use Craigslist and swap in a complete 305 or 350. be sure you get all the pulleys and brackets including the block side motor mounts. It should drop right on the frame mounts.

But 6's are more cool.