tips for a 400

I have a flat hood

my car is a 80 firebird nothing more nothing less

Yeah you could run a modified HEI dist. be sure to have it recurved for your cam. Put a good coil and I think its either mallory or msd makes an a performance module.

with the flat hood and the rpm intake it is going to be close it may hit.

well if it dose hit i will be unhappy because then with the new engine inplace I will be forced to buy a cowl but o well that may b a good thing to get out of the way

what kind of distributer did your friend run?

and what dose HEI mean exactly?

HEI=High Energy Ignition

ahh thanks

I was thinking ppl said it like OEM or something but now i know

Originally posted by petereggy
well if it dose hit i will be unhappy because then with the new engine inplace I will be forced to buy a cowl but o well that may b a good thing to get out of the way
You may have to get a really low profile air cleaner, until you get the cowl. The RPM manifold is pretty high.

yah but a high rise intake is good and Im going to build the engine out of the car and once its completed and I have the cowl then it will go in

Dose anyone know what number heads came on the 69-70 ram air 4

and what characteristics help to identify them?

Originally posted by petereggy
Dose anyone know what number heads came on the 69-70 ram air 4

and what characteristics help to identify them?

I don't know the numbers but they had round exhaust ports, are rare, and expensive.

yah i knew about the ports but thats all i knew

The castings on the ram air IV are 722 in '69 and 614 in '70.

alright thanks

what are no.12 and no.13 heads?

and what would be the best cam to run in my 400 made by either comp or crane?

This would be a good substitute for the cam I told you before:
51-225-4 Comp. Cam 284/296, 240/246 @ .050,
.507/.510 lift, 110 degree centerline

no 12 ram air III head
no 13 '70 grand prix/ firebird head

They are both 72cc D-port heads.

so those heads are identical then?

also is that a mechanical or hydrolic cam?

Hydraulic

basically the heads are the same

alright thanks

thats what ill look for first before i buy a pair of edelbrock heads is either no.12 or no.13 heads

OK here is what im planning to put into my 400 aside from heads


Comp Xtreme Camp 240/246 @ .050 $119.95
Comp High Energy Hydraulic Lifters $89.95
Speed Pro Forged Std. Bore Pistons (10:1 Comp. w/ 72cc) $34.95 (each)
Comp Cams Magnum Rocker Arms 1.52 Ratio $145.95
Edelbrock Preformer RPM Intake $189.95
Holley 4160 750 CFM Electric Choke $265.95
B&M Holeshot Converter 3000 stall $352.95
MSD Super HEI Ignition Kit w/ 6A box $199.95


anyone have any comments on this list? all prices are in USD and are from summit racing

Im hoping to find either no.12 or no.13 heads to go in rather then spending the big bucks for edelbrock heads