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Old 05-30-2003, 11:07 AM
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Question 305 build up

can anyone tell me what this will give me? a 1979 305, bored .030 over, comp cams EXE 262 cam, flat top pistons, heads have 1.74/1.50 valves, performer rpm air gap intake or would the performer air gap be better? and a 600 cfm edlebrock carb, hooked to a th350 with a 2000 stall, or would I need a stall? and a shift kit installed, motor is going in an 89 camaro? What do think this would give me? The rearend gears are 3.42s, which intake should I go with?

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Old 05-30-2003, 11:29 AM
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I think you will be close to 250hp providing you have a decent exhaust system though. I would use the regular performer intake because your cam isnt really that big & hood clearance might be a problem. The rest sounds pretty good but any extra money you have to spend I would use on having larger intake valves installed and mild port job too.
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Old 05-30-2003, 11:41 AM
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I was thinking of buying a hood that had a 4 inch cowl induction scoop, also how big of a cam could I go? I am thinking of 305 HO heads , do I need the stall for the setup I am planning on as of now?
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Old 05-30-2003, 12:05 PM
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Shane, your stall for your current set up should be just fine. As for how big of a cam can you go depends on what you are trying to do with the motor. The bigger you go, the higher rpm range it operates in. If you are trying to keep this thing fast on the street, you are going to need good low end torque, and your cam should be good for this. If that's true, listen to greg and go with the regular performer. It's not as pretty to look at as the air gap, but it will make the power where it counts for the street. I wouldn't bother with the bigger valves in the heads, but a good port job would probably see more gains.
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Old 05-30-2003, 12:31 PM
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wasn't thinking when I wrote the last post (thought the air gap was something else). The air gap would be fine also. I don't think a 4" cowl is necessary (I just personally don't like too high of a cowl unless it's a full blown race car).
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Old 05-30-2003, 11:47 PM
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ok, about the cowl , I just thought I would need it to clear the carb with intake, with the air gap intakes, there are 2 different ones, the performer and performer RPM, which do you think would work best for mine? also I can get the heads with 1.84 valves for 139.00 each, and then have them ported and I also forgot to metion I will be running 1 5/8 hooker headers with some type of flowmaster mufflers. Will this cam I chose give me a little rump? Thanx for your help guys, I really appreciate, when my project is done I wiill post pics for you, also, this is my first time.
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Old 05-31-2003, 12:26 AM
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[ May 31, 2003: Message edited by: 78 monte ]

[ May 31, 2003: Message edited by: 78 monte ]</p>
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Old 05-31-2003, 09:51 AM
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If you need new heads, then go for the HO's. Other than the slightly larger valves, I think they are the same as yours. Either way, have them pocket ported & get a good 3-angle valve job.
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Old 05-31-2003, 10:06 AM
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ok, what is pocket ported? I am planning on making the intake and exhaust ports the same as the gasket in size already, I went and bought the tools to do it today, Could you tell me which of those intakes I should use?
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Old 06-01-2003, 08:07 PM
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Pocket porting is basically working the intake port just before the valve opening. This area is the most restrictive part of tne port. Best thing to do is get a book that explains porting. David Vizard has two good ones that I know of: How To Modify Small Block Chevy Cylinder Heads, & How To Build A Max Performance Small Block Chevy On A Budget. The first has more in-depth info on heads, but the second is newer. I would definitely read at least one before I cranked up the grinder. They have good information on what to do & also what NOT to do. As far as the intake, I'm leaning toward the Performer. The second Vizard book has info on intake selection also.
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Old 06-02-2003, 01:44 AM
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ok ,thanx for the info, I decided on the performer also
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Old 06-03-2003, 01:08 AM
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Shane, I may have told you wrong about the HO heads being the same as yours. I saw something on another board saying the standard heads have 64cc chambers & HO have 58cc. If so, the HO's would increase your compression by about 0.6 to 0.7 points.
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Old 06-03-2003, 08:29 AM
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thats kool about the chambers, I'm going with the HO heads, then I can practice porting on my old heads,
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