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Old 02-12-2018, 03:49 PM
Jim Moshier's Avatar
Jim Moshier Jim Moshier is offline
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Join Date: Dec 1999
Location: Acton, CA
Posts: 335
Default 455 engine build for 71 Grand prix

I'm looking to build a 455 +30 for my 71 GP. I will be running 3.55 gears on the street/cruising with occasional drag strip trips . I have accumulated an array of parts and looking for some input as to the assembly of such.

71 455+30 stock crank and new 6.6 and 6.8 forged rods looking for thoughts on the rod choice. I have not selected the pistons as of yet but the heads are SD Performance worked over cast iron 6X flowing 265 cfm intake and 200 cfm exhaust with 90 cc, with the crossover filled and Harland Sharp 1.65 rocker arms.
Thinking 9.5-10:1 compression (everyone's go to compression numbers it seems) I have a stock 1971 intake and a Edelbrock RPM to choose from for the intake with for the Mixer I have been looking at the Holley Sniper fuel injection long term but will start with the Cliff built Q-jet that is on the car presently.
Now the Can of worms I have an old cam from Crane and looking for input from some of the more educated than me, on this ....and everyone has an opinion let's hear them! :-) I have attached the Cam card for review I am interested in hearing which way you are leaning. regarding the rods, compression, intake and cam. As far as the transmission I currently have 700r4 with a 10" tight Continental 3200 stall. Looking for input and reasoning for the decision please
Thanks
Attached Files
File Type: pdf Crane Cams.pdf (44.1 KB, 193 views)

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Jim Moshier

1971 Grand Prix 462ci SD Performance 6x heads
1962 Catalina 389
1968 Firebird 400-455 I haven't decided

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