Is this a square bore or spread bore?
Thread Starter
Instructor
Joined: Jun 2005
Posts: 202
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From: Brandon Ms
Is this a square bore or spread bore?
I have a Holly 650 double pumper number 4777. Is this a square bore or spread bore and which Eldebrock intake will it fit and clear under the hood of a 1970 Vette with a low profile air cleaner? Thanks for you assistance.
Race Director
Joined: Apr 1999
Posts: 11,520
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From: CORVETTE 77 385 C.I. TEXAS
4777 is square bore.
Previous 2101 Performer is better for performance than the current one.
The previous 2101 Performer & Chevy's bow tie intake are similar. Chevy has said was as good as the high rise (LT-1). Chevy's bow tie logo & Edelbrock logo are behind the thermostat housing & not on the passenger side runner.
EPS is only about 1/4" taller & should work w/ a drop base filter.
The high rise intakes like RPM need at least the LT-1/BB hood.
There needs to be at least about 3/4" clearance over the Holley vent tubes.
Previous 2101 Performer is better for performance than the current one.
The previous 2101 Performer & Chevy's bow tie intake are similar. Chevy has said was as good as the high rise (LT-1). Chevy's bow tie logo & Edelbrock logo are behind the thermostat housing & not on the passenger side runner.
EPS is only about 1/4" taller & should work w/ a drop base filter.
The high rise intakes like RPM need at least the LT-1/BB hood.
There needs to be at least about 3/4" clearance over the Holley vent tubes.
