Power brake booster, advice.

[Glen C.]

Are there any major differences in the 64-67 Corvette power brake boosters that I see on line, other than the partial part number stamped on the tab? They all seem to look the same, with the riveted bracket & no Delco stamping on the case. Most I assume are made off shore??? Prices range from ~ $70 to over $400. I'd like to replace my 66 original, it is a little too pitted to be replated. Thanks!

[Joe R.]

Re: Power brake booster, advice.

Glen,

The booster from 64-67 is the same with only the date changed on the tab of half the booster.
Specs are the same so make your best deal and run with it.

JR

[Glen C.]

Re: Power brake booster, advice.

Glen,

The booster from 64-67 is the same with only the date changed on the tab of half the booster.
Specs are the same so make your best deal and run with it.

JR

Joe, I guess the $75.00 PB booster with free shipping, will work for me just fine! Thanks, Glen.

[Michael H.]

Re: Power brake booster, advice.

Are there any major differences in the 64-67 Corvette power brake boosters that I see on line, other than the partial part number stamped on the tab? They all seem to look the same, with the riveted bracket & no Delco stamping on the case. Most I assume are made off shore??? Prices range from ~ $70 to over $400. I'd like to replace my 66 original, it is a little too pitted to be replated. Thanks!

Glen,

While the front and rear shells may be the same as 64-66, I believe there are some internal differences for 67. I don't remember what the differences are though. Seems like I remember that some of the internal components had a unique part number for 67?

[John H.]

Re: Power brake booster, advice.

Glen,

While the front and rear shells may be the same as 64-66, I believe there are some internal differences for 67. I don't remember what the differences are though. Seems like I remember that some of the internal components had a unique part number for 67?

Michael -

The booster-to-master cylinder pushrod (which is part of the booster assembly) is the "long" version on the '67 booster; '67 was the only year that used exactly the same master cylinder (5455509/DC) for both manual and power brakes, and that master cylinder had the "deep" hole in the rear piston due to the manual brake application. '64-'66 boosters had the "short" pushrod, as their master cylinders were unique for power brakes and had the "shallow" hole in the piston.

There may have been other internal changes in the '67 booster, but I've never had one apart.

[Joe R.]

Re: Power brake booster, advice.

Michael -

The booster-to-master cylinder pushrod (which is part of the booster assembly) is the "long" version on the '67 booster; '67 was the only year that used exactly the same master cylinder (5455509/DC) for both manual and power brakes, and that master cylinder had the "deep" hole in the rear piston due to the manual brake application. '64-'66 boosters had the "short" pushrod, as their master cylinders were unique for power brakes and had the "shallow" hole in the piston.

There may have been other internal changes in the '67 booster, but I've never had one apart.

John,

Yes, they were exactly the same with the exception that the 67 Manual had a cast number of 5455509 stamped DC and the 67 Power had a cast number of 5480346 stamped PG. Also you might find that the manual had a smaller piston and the power had a 1 1/8" piston.
Doesn't the 67 Judging Manual reflect this difference?????

JR

[Michael H.]

Re: Power brake booster, advice.

John,

Yes, they were exactly the same with the exception that the 67 Manual had a cast number of 5455509 stamped DC and the 67 Power had a cast number of 5480346 stamped PG. Also you might find that the manual had a smaller piston and the power had a 1 1/8" piston.
Doesn't the 67 Judging Manual reflect this difference?????

JR

JR....

Are you sure about that? I thought 67 with with and without power brakes were th same with a 1" bore. Only 67 with heavy duty brakes used a different master cyl. with a 1 1/8" bore.

[Joe R.]

Re: Power brake booster, advice.

Michael,

I stand corrected as I have talked to the 67 Corvette Factory in Houston and it is confirmed that the 346 with the 1 1/8" was only on the HD brake Corvettes.

JR

[Michael H.]

Re: Power brake booster, advice.

Michael,

I stand corrected as I have talked to the 67 Corvette Factory in Houston and it is confirmed that the 346 with the 1 1/8" was only on the HD brake Corvettes.

JR

You didn't have to go alla way to Texas to get the correct answer. Coulda just asked me.

The 68 model was the year that began using different cyl's for standard and power brakes.