https://www.holley.com/support/

That is one of the handiest pages one can ever bookmark when using Holley carbs.

 

You will need to crossreference the 4-digit "list" number stamped on the carb choke stack with the cfm rating. Pray it hasn't been machined off - a common hipo modification

 

Okay so I found out the carb is a Holley Classic. It is a 600 cfm vac secondary carb with electric choke. The numbers I got off of the choke horn are 80457-2 and 1870. Can yall guys tell me what you think about this carb and if its any good.

Thanks, John

 

An update on the build goes as:

Parts I Have
240 head
Crane Gold 3/8 1:7 roller rockers

Parts I know Im getting
Crower 284/290 Hydraulic Hauler
Crower lifters
Crower spring kit
ZDDP plus oil additive
Glowshift wide band gauge

Parts I need
Cloyes adjustable timing set
Vavle cover (make stock taller)
Assorted gaskets
2 oil changes

 

It's been discussed a lot before, but don't bother with 1.7 rockers if you have a cam. The 1.7 rockers at both lift and duration. If you're looking for more, buy a bigger cam and keep the 1.6 rockers.

 

I got the rockers for a really good price and couldnt pass them up. The cam is the largest hydraulic flat tappet I can find actually and I would be kind of upset if i didnt get to use the rockers. Im not trying to say you dont know your stuff but I want to use them and If I dont like them I let you say I told you so. Lol

Thanks, John

 

Alright, fair enough. You won't blow up your engine. Others have used them. I just wouldn't suggest them.

 

Any updates? I have the comp 268 in mine now and have a crower 284 sitting in the box, and would like to know how you like the 284.

I'm going to run the 268 initially as it matches my stall converter and turbo.

Dale

 

No, Im sorry to say that I havn't had any progress. I am sad to say I lost interest in the 300 because I realized that I don't have the kind of money to build up the 300 the correct way. I just took a step back and found that if I was to dump 500 bucks into the 300 I would have little to no results, hardly an intake or headers simply because it doesn't have a big enough market. 500 bucks on a small block would get me headers, intake, ignition, and possibly a carb also. The 300 is a great engine and I will come back to it one day but for now it just doesn't have the right prices for a high school student. I actually sold my 300 to an old man today who was building a 50s model F100, he said he wanted something different and I told him this was what he needed. A 351w now powers my ride. Its sitting in the drive way getting prepped for a 4x4 conversion.

 

351w is a good option for power when fuel milage is not a concern, dollar for dollar certainly more power. I chose the 300 to stay away from the belly button crowd. The first 300 i turboed was 100% stock (1xx,xxx miles) with a holley 350 2 barrel, dp intake 4-2 barrel adapter. Hx 35 non intercooled. Only 13 psi, 460's couldn't even come close, and great fuel milage.

Dale