[HWYSTR455]

8" Dual diaphragm booster works down to 12" of vacuum, so you would have to have a series cam to make less than that.

Many times people don't have enough idle timing, which leaves them with low idle vacuum. Manifold vacuum on a can is the solution for those people.

When I was still doing V belts, I did a set of RARE pulleys and all was good. For the most part. I needed more amps and there's a limitation with V belts of how many amp alt you can run. For me, 140a was about the max.

Serp is the way to go, it solves many issues/limitations. But some don't want to switch to a 11-bolt cover. IMO, make the jump, it's a win-win-win solution.

March stuff is affordable. But remember, you're adding weight to the front, which is ahead of the front tires. In most cases, you need more spring to deal with it.

As for PS pump flow and psi, repop pumps are all over the place on the type 1 pumps. Type 2 pumps it's basically 3 diff ones, but you still need to know. Valving in repop boxes are all over the place too, and you basically have to trial & error it.

Hydroboost systems were designed using type 2 pumps. Some kits kits come with a type 1 pump, and you have to use that pump. I know people say you can swap valves around in the type 1 pumps, but even the go-to references are outdated.

If you upgrade to a 600 series box, those too are generally mated with a type 2 pump.

It's best if you 'know', and not just wing it. BTDT...


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