79T/A

I'm looking to put 350 heads on my stock 403 in my 79 trans am. I was considering a cam swap to take advantage of the compression. My specs are 79 ta, stock 403, muncie 4 speed (eventually change to a 5 speed) and a 3.08 rear gear(eventually change to 3.73). I really like the profile of the erson cams. Does anybody who has a similar build have any recommendations?

svnt442

403 with a stick? They never did that from the factory and that is why all of the T/A 4 speeds were poncho 400's.
What did you do to the engine to get the stick behind it?

Also....you won't want any 77-80 350 head as they are about as junk as the 403 heads are. Any of the early 350 heads use a 7/16" head bolt where the 403 uses a 1/2" head
bolt, so the holes will need to be drilled out to work.

79T/A

I am looking for early 5,6,7 heads. I bought the car with the 4 speed in it. It's setup exactly like a factory 400 4 speed. It looks like the crossmember has been moved and the floor had to be cut some. Everybody says the 403s weren't drilled for a pilot bushing but the guy I bought it from said it was and he had no problems with that. The engine is desmogged I tuned it up and rebuilt the carb. It dynoed recently at 203 hp and 346 tq @ 2700 rpm. With a cam and heads I would imagine 300hp and 425 tq is not out of the question. Just not sure on cam selection.

Warhead

Many of the later 77 up cranks were drilled for a 4 speed. My orig 403 crank was, and so was the replacement I found for it.

403 with large valve #5 heads, in my 65 Cutlass, 3.55 gears.
Love the power.

lemoldsnut

I am a fan of the late 77-81 Trans Am's and have owned a few. I think it would be fun to own one with an Olds and a 4 speed. I always thought it would be fun to put a 320 hp 330 in one. They run so well and would fit perfect.

79T/A

I'm looking for a good low end torquey reliable street engine. Do you have any cam recommendations that would work well with the combo I'm trying to put together.

79T/A

It's kinda funny every TA I've ever owned has either had a olds or Chevy in it. My first ta had a 455 olds in it. Sold that car but kept the motor. I really like olds engines.

olds 307 and 403

I also prefer the Olds V8, SBO especially. Talk to Cutlassefi on here, Mark Remmel, he is an Erson cam dealer and does custom cams.