sino305

So I have a stock motor from 74' so it's a 4 port 13b.
I have a Holley 650 and a Holley blue fuel pump. I plan on rebuilding the engine soon and since it's not a daily driver I want to go full bridge on it.
Now here comes a question. stay with the 4 port or go through the pain in the *** of putting a 6 port in it?
p.s. no boost in the future for this car. Just bottle.
Thanks guys.

Directfreak

iTrader: (2)

Six ports are good because they offer "some" torque, and better drivability.
They are fine in stock and street port versions.

A Four port will yield more top end horsepower, and will be more responsive to
boost/nitrous/porting. My concern is that your '74 engine may be toast when you open it up and see
if anything is truly usable.

sino305

well, as far as the condition of the 4 port, I drive it around and I've never had any mechanical problems related to the engine itself. So, it SHOULD be in decent shape.
Saying that we live in a perfect world and the motor is good, with you saying the 4 port will be more responsive to a bottle, and it yielding more top end power. And seeing how it would be so much easier on my pocket to keep the 4 port, is this what you recommend?

project7s

iTrader: (5)

i have been wondering the same question as to which one you can get more power from without any power adders the 4 or 6 port engine. also if you put a intake and holley on a 6 port would that help or hurt the power over the efi since im assuming the 5th and 6th port would be open all the time at that point?

j9fd3s

iTrader: (3)

if you're going to bridge it, 4 port > 6 port, always

project7s

iTrader: (5)

i was thinking stock with add ons like header, holley,ect. maybe a street port.