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  Holley 750DP body w/850 bse plate?

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Author Topic:   Holley 750DP body w/850 bse plate?

Posts: 108
Registered: Nov 2000

posted 03-08-2001 12:35 PM     Click Here to See the Profile for Rustang1   Click Here to Email Rustang1     Edit/Delete Message   Reply w/Quote
I've heard that a popular swap is attaching the 850 base plate to a 750 body. Is this more than a bolt-on, requiring differnt boosters, etc.? And what are the advantages over just putting on a stock 850DP on my motor? I'm running a 351W/clev 4Vheads at 3100# and shifting at 7500. I was wondering if this mod would help in the lower rpm's and still not sacrifice in the uppers compared to a straight 850?

1968 Mustang,Clevor,C4
1969 Torino 351C 4spd
1978 F150 460 C6
1978 F150 351W C6

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Posts: 18704
From: Lyons, IL, USA
Registered: May 99

posted 03-08-2001 04:40 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
It used to be a very popular swap before Holley got into the race carb business. It would effectively increase the 750's flow to about 780 CFM without over carburating the engine as an 850 might do. You would be better served in purchasing one of Holleys new "race ready" carbs in the 770 to 830 CFM range.

Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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Posts: 1367
From: Spencer, WV
Registered: Jan 2001

posted 03-08-2001 05:17 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
I believe their 950HP has 750 sized throttle bores and a 850 sized baseplate with a bunch of smoothing and re-contouring thrown in. Everyone I've spoken with that has used the thing has loved it.

Good Luck!

Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3

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kid vishus

Posts: 3894
From: middle of NC
Registered: Oct 2000

posted 03-08-2001 06:49 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
I had a 950HP on my 4v cleveland and I loved it. It was worth .3 in the 1/8 over my standard 750 DP. With the 4v cleveland heads, you are not going to have much bottom end torque. Unless it's a stroker.

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